Latest / Murder Files Unsealed / Unsolved murder of Las Vegas teen remains a mystery after 40 years

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Unsolved murder of Las Vegas teen remains a mystery after 40 years · Murder Files Unsealed

0:00
Speaker 1: So imagine it's nineteen eighty three, you could actually, well
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you could literally murder someone in broad daylight, leave their
0:06
body just a couple of miles away from the the
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glowing neon epicenter of the Las Vegas Strip, and then
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just completely vanish, right.
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Speaker 2: Yeah.
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Speaker 1: And it wasn't because the killer was some like unparalleled
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criminal mastermind or anything. It was because the desert itself
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was well, it was essentially an act of accomplice.
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Speaker 2: It's a staggering reality of that era, honestly, because you
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cross this highly specific geographic line, right, you move from
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the most surveyed, brightly illuminated city on Earth into this
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just this ancient, indifferent wasteland, and the minute you cross
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that line, the rules of forensic science just fundamentally break down.
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Speaker 1: Which you know, brings us to the core of what
0:45
we're unpacking today for you, the listener. We are diving
0:48
into this deeply chilling forty year old unsolved mystery.
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Speaker 2: The disappearance and murder of a seventeen year old girl
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named Catherine Tie exactly.
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Speaker 1: And just to be completely clear about our mission today,
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because we always want to set that straight. This is
1:01
not just your standard true crime recap we are really
1:05
looking under the hood of this investigation to understand exactly
1:09
why certain mysteries just completely freeze in time.
1:13
Speaker 2: Yeah, we're going to deconstruct the actual mechanical hurdles of
1:17
nineteen eighties police work, right, We're going to examine the uh,
1:21
the forensic incinerator that is the Nevada Desert, and critically,
1:25
we're going to look at how modern genetic science is
1:28
just completely rewriting the rule book for what constitutes a
1:32
dead end.
1:32
Speaker 1: Because Catherine's case is, I mean, it's the perfect, albeit
1:35
incredibly tragic lens for this exact discussion. It really sits
1:38
at the intersection of you know, explosive urban growth, massive
1:42
forensic limitations, and the dawn of these highly transient serial predators.
1:47
Speaker 2: Absolutely, if you want to understand how criminal investigation evolved
1:51
from the sort of guesswork of the late twentieth century
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to the microscopic precision of today, you really have to
1:56
understand what went wrong in nineteen eighty three.
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Speaker 1: Yeah, and I have to say when I I was
2:00
preparing for this deep dive, reviewing all the sources in
2:03
the historical context, my initial reaction was obviously just profound sorrow.
2:07
Of course, you know, you have this young woman whose
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entire trajectory was just completely erased. But from an analytical standpoint,
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the sheer volume of obstacles the detective's face is just
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it's mesmerizing. It's like looking at a locked room mystery
2:22
where the room itself is constantly changing shape.
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Speaker 2: That's a great way to put it.
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Speaker 1: Let's ground this in the timeline. First February seventh, nineteen
2:31
eighty three, Chaparol High School.
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Speaker 2: Right, So the foundational element you have to understand here
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is the normalcy. Catherine was seventeen, and by every available
2:40
metric we have, she was dependable, bright, deeply embedded in
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her community.
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Speaker 3: Just a normal teen exactly.
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Speaker 2: And Las Vegas in nineteen eighty three, I mean it
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was experiencing intense growth, sure, but at its core it
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still functioned very much like a small town for the
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locals who actually.
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Speaker 1: Live there, the people outside the immediate orbit of the casinos,
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right right, People.
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Speaker 2: Knew their neighbors. Teenagers had very predictable routines.
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Speaker 1: And February seventh, it starts as the ultimate, perfectly ordinary
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and Monday she goes to her classes. She has this
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plan to meet a friend immediately after the final bell.
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It's just the kind of mundane schedule that completely defines
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high school existence. Yeah, and then she simply never arrives
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for that meeting, and she never comes home.
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Speaker 2: The psychology of those first few hours is clinically fascinating,
3:25
and unfortunately it's a pattern we see in almost every
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missing person's case. Oh so, well, there's this distinct, agonizing
3:32
transition that a family goes through when someone doesn't show up.
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The human brain, it automatically defaults to the path of
3:40
least resistance just to avoid trauma.
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Speaker 1: Oh right, like making excuses.
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Speaker 2: Precisely, you assume a flat tire, you assume she lost
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track of time talking to a teacher or something. It's
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a biological defense mechanism against immediate panic.
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Speaker 1: But because Catherine was so reliable, that defense mechanism crumbles
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incredibly fast, doesn't it. Like if you have a teenager
3:58
who routinely breaks, maybe you wait until midnight to actually
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start worrying. Ye, But if you have someone who is
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historically punctual and always communicative, the alarm bells start ringing
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at like four zero pm. I always think of it
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like a record player suddenly skipping off the track right
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in the middle of a song. Everything is completely utterly
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mundane until the exact second.
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Speaker 2: It just isn't that pivot. That exact moment the parents
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realize the mundane explanation is no longer statistically viable. That
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is where the trauma officially begins. The window, you know,
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harmless delay, just slams shut.
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Speaker 1: And they're forced to confront the catastrophic, right.
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Speaker 2: So they contact the authorities, and immediately the investigators hit
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their very first major wall, which is the complete absence
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of data, which.
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Speaker 1: Is wild to think about. I mean, you might be thinking,
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how does a seventeen year old just vanish from a
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crowded high school in the middle of the afternoon. Chaparral
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High School wasn't some isolated cabin in the woods, Not
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at all. You have hundreds of students, faculty, buses, parents everywhere.
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The logistics of an abduction in that kind of environment
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should theoretically generate a massive amount of noise.
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Speaker 2: It really should, and the fact that it didn't speaks
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to the terrifying efficiency of a stranger abduction. You see, statistically,
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most victims know their attackers, right, the stranger reduction is
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incredibly rare, but when it happens it is surgical. If
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an offender uses a ruse, or if they act with
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sudden overwhelming force in a blind spot like say a
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parking lot perimeter or a side street just off campus,
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the window of execution is under ten.
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Speaker 1: Seconds, wow, under ten seconds, yeah, ten.
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Speaker 2: Seconds to pull someone into a vehicle, close the door,
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and blend seamlessly into the afternoon traffic.
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Speaker 1: And because there's no noise, there are zero witnesses. No
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one gets a license plate, no one registers the make
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of the car, let alone the face of the driver exactly.
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Speaker 2: And for detectives, in nineteen eighty three, a missing person's
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case relies almost entirely on eyewitness testimony to establish any
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kind of directional vector.
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Speaker 1: So without a witness, they did just have a cold trail.
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They had literally no trail whatsoever.
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Speaker 2: None. They are essentially standing at the high school doors
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looking at three hundred and sixty degrees of pure possibility.
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Speaker 1: It's a complete investigative vacuum. And that vacuum held for
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an excruciatingly long time, just thirty days of complete silence.
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The first tangible piece of evidence didn't even materialize until
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a month later, right, And it was a clue that
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drastically shifted the entire reality of the investigation.
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Speaker 2: Yeah, a month after she disappeared, her body was discovered.
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And the location here is really critical. It was an
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undeveloped desert area near the intersection of Indias Avenue and
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Twain Road.
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Speaker 1: Which was basically the edge of the world back then.
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Speaker 2: Essentially, Yeah, it was on the eastern periphery of Las Vegas,
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right where the pavement just surrendered to the dirt. And
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at that exact moment, the missing person protocol is completely
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abandoned and it becomes an active homicide investigation.
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Speaker 1: And the physical reality of the scene confirmed everyone's absolute
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worst spheres Right, she had been abducted and murdered. But
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from a procedural perspective, the detectives made a move that
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I frankly I find incredibly counterintuitive. They locked down the details. Yes,
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they actively withheld the specific disturbing mechanics of the crime
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scene from the public and the press.
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Speaker 2: Well, this is the concept of hold back evidence, and
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it is honestly one of the most misunderstood strategies in
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law enforcement. Detectives will deliberately keep highly unique identifiers of
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a crime scene completely classified. They lock it in the
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case file. I mean not even the extended family is told.
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Speaker 1: Okay, wait, I really need to push back and challenge
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the logic of this. Sure, you have a case with
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zero witnesses that is already a month old, the trail
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is actively freezing. Usually this is the exact point where
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you set up a tip line and you just beg
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the public for help. If you are desperate for a lead,
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How does keeping secrets actually help you?
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Speaker 2: It sounds backward, I know, right.
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Speaker 1: I mean, if the public doesn't know what to look for,
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say a specific type of rope or a missing piece
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of jewelry, how can they possibly phone in a relevant tip.
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Speaker 2: It's a brutal trade off, no question, but it is
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an absolutely necessary one because holdback evidence serves as the
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ultimate light detector. You have to understand high profile tragic
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cases act like absolute magnets for a very specific type
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of psychological profile.
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Speaker 3: The false confessor exactly, the false confessor.
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Speaker 1: The idea that someone would voluntarily walk into a police
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station and claim responsibility for a horrific murder they didn't
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commit is just staggering to me, Like, what is the
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psychological payoff for that?
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Speaker 2: It varies wildly often, it's a deep seated need for notoriety,
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just wanting to be the center of attention, or it's
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a manifestation of severe mental illness. Sometimes individuals actually convince
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themselves they did it through some sort of delusion.
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Speaker 3: Wow.
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Speaker 2: But here's the thing. If police publish every single detail
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of the crime scene in the morning paper, literally anyone
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can walk in and deliver a perfectly accurate.
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Speaker 3: Confession because they just read the script exactly.
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Speaker 2: By keeping two or three highly specific, non obvious details secret,
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detectives can instantly neutralize those false confessors. So if a
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guy comes in claiming he strangled the victim, but the
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holdback evidence shows a highly specific, unusual knot was used
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on the wrists, the detectives just asked him to tie
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the knot.
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Speaker 1: And if he can, he's out right.
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Speaker 2: They know immediately he is wasting their time.
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Speaker 1: Okay, so it filters out the noise. That makes sense.
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But it's more than just filtering, isn't it. It's really
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about preserving the integrity of the eventual endgame.
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Speaker 2: Precisely fast forward five years. Imagine a legitimate suspect is
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sitting in a bar and he gets drunk and he
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brags to a friend about a detail that was never
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ever released to the press. Ah, that friend goes to
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the police. Suddenly you have circumstantial evidence that is incredibly
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powerful in front of a jury, because if that detail
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had been public knowledge, the defense attorney would just stand
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up and say, my client read it in the newspaper.
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Hold back evidence protects the future trial.
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Speaker 1: Okay, okay, The strategy makes total sense when you frame
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it as a long term trap. The whole strategy assumes
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that you actually have a workable crime scene to begin with.
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Very true, and this brings us right back to the desert.
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We touched on this in the beginning, but we need
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to really unpack the forensic reality of the Majave in
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nineteen eighty three, because honestly, we are all so conditioned
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by television to view crime scenes as these pristine, sterile
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environments just waiting to be dusted for prints.
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Speaker 2: Oh, the television procedural has done a massive disservice to
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the public's understanding of environmental forensics. The Nevada Desert is
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not a sterile laboratory. It is a hostile, active destroyer
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of evidence.
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Speaker 1: Let's look at the actual physics of it. The body
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was exposed to the elements for roughly thirty days.
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Speaker 2: Right, So first you're dealing with extreme thermal.
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Speaker 3: Cycling, the temperature swing exactly.
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Speaker 2: Extreme swings in the desert. You can have daytime temperatures
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absolutely baking the ground, followed by plummeting near freezing temperatures
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at night. This rapid expansion in contraction wreaks utter havoc
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on biological material structures literally burst from the stress.
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Speaker 1: That's horrifying from an investigative standpoint.
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Speaker 2: It gets worse. Then you introduce ultraviolet radiation from the
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constant sun. U V light basically acts as a microscopic scissor.
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It shares the chemical bonds within DNA and rapidly degrades
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blood proteins.
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Speaker 1: So the environment is actively dismantling the biological editors at
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a molecular level. And then, of course you have the
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macro environment the wind.
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Speaker 2: The wind is a massive factor. Las Vegas is situated
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in a basin and the winds there can be relentless
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any trace evidence like a hair from the attacker, a
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microscopic fiber from their car seat, a footprint in the sand.
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It is systematically erased or blown miles away within hours,
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let alone thirty days.
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Speaker 1: And we haven't even mentioned the local wildlife. You've got coyotes, vultures, insects.
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The desert ecosystem is just incredibly efficient at breaking down
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organic matter.
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Speaker 2: It really is. It is essentially a massive natural incinerator
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for forensic data. By the time investigators arrived at the
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intersection of Indios and Twain, the landscape had already scrubbed
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away a massive percentage of the story. The physical space
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itself was aggressively working against the detectives.
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Speaker 1: And what makes this era so fascinating and it's just
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so incredibly frustrating, is that the natural environment was really
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only half the problem. The human environment was just as chaotic.
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Las Vegas in the late seventies and early eighties was
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not the corporate, meticulously monitored mega resort city it is today.
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It was undergoing this incredibly volatile transition.
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Speaker 2: You really have to look at the urban geography of
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the time. The population of Clark County was just exploding.
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You had massive influxes of new residents drawn by the
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casino economy, all the new construction, the cheap land, but
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municipal infrastructure almost never keeps pace with that kind of
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explosive population growth.
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Speaker 1: It's like a teenager going through a sudden, awkward growth spurt.
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The bones of the city, meaning the police department, funding
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the street lights, the paved roads, the surveillance systems, they
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just couldn't keep up with the rapidly expanded physical footprint
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of the neighborhoods, and.
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Speaker 2: That creates what urban chronologists call blind spots. You have
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these massive, sprawling residential tracks being built directly adjacent to
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miles of raw, completely unled desert.
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Speaker 1: Yeah, you have paved roads that just suddenly end in
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dirt paths exactly.
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Speaker 2: Have vast swaths of land that are technically within the
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city's jurisdiction but are virtually unpatrolled because the police force
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is stretched far too thin just trying to manage the
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urban core.
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Speaker 1: So the infrastructure literally creates the perfect topography for a predator.
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You have easy access to potential victims in these expanding,
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quiet neighborhoods, and you are only a two minute drive
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away from an unmonitored dumping.
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Speaker 2: Ground, and you have an incredibly efficient escape route right
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next door. The interstate system, particularly Interstate fifteen, cuts directly
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through the heart of the city.
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Speaker 3: Right fifteen.
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Speaker 2: I fifteen connects southern California up to Utah and beyond.
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For a criminal, it is a high speed artery. You
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can commit a crime in Las Vegas and be cross
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state lines, sitting in a completely different legal jurisdiction before
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the victim is even reported missing by their family.
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Speaker 1: That level of mobility fundamentally breaks the nineteen eighties police model,
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doesn't it Because that model was highly localized. Detectives in
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Vegas weren't instantly sharing databases with detectives in Los Angeles
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or Salt Lake City. Everything was completely siloed and physical
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filing cabinet absolutely.
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Speaker 2: Furthermore, you have to consider the baseline economy of Las
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Vegas itself. It's built on tourism and transience.
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Speaker 1: So many people coming and going.
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Speaker 2: Millions of people flowing into and out of the city
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every single week, people who leave absolutely no permanent footprint.
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So if you were a detective trying to build a
14:38
suspect pool, how do you even begin to narrow it
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down when half the people who were in the city
14:44
on the day of the murder have completely evaporated by
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the weekend.
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Speaker 1: It's worse than finding a needle in a haystack. It's
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finding a needle in a haystack where the hay is
14:52
actively being loaded onto trucks and shipped out of state
14:55
every twelve hours.
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Speaker 2: It's a perfect analogy.
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Speaker 1: And this infrastructure, this baked in and o animity, it
15:01
naturally attracted a very specific, terrifying element to the area
15:05
because as we look closer, Catherine was not an isolated case.
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Speaker 2: No, she really was not. When you pull back the
15:11
lens on Las Vegas during this exact era, a very dark,
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broader context starts to emerge. There was a highly troubling
15:19
cluster of missing and murdered young women in the region.
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Speaker 1: Let's examine the comparative forensics of this, because I think
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the most glaring parallel here is the case of Kim Bryant.
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Speaker 2: Yes, Kim Bryant was sixteen years old when she vanished
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in nineteen seventy nine, and the behavioral signature is between
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her case and Catherine Tie's case. They are simply impossible
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for any seasoned investigator to ignore.
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Speaker 1: Let's walk the listener through the comparative timeline. Both of
15:45
them are high school students, all right. Both are abducted
15:47
and broad daylight under completely ordinary circumstances. Both are subjected
15:51
to sexual violence and both are eventually discovered in remote,
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hostile desert environments right on the periphery of the city.
15:59
Speaker 2: In criminal profile filing, when you see a cluster of
16:02
highly specific variables repeated across multiple events like that, the
16:07
target demographic, the method of acquisition, the disposal environment, the
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statistical probability of random, unrelated.
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Speaker 3: Actors' plummets, it just doesn't happen.
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Speaker 2: It doesn't. The prevailing theory naturally shifts toward a single
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serial predator operating within that geographic footprint, And.
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Speaker 1: This brings a very specific name into the historical record
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of this era, Johnny Blake Peterson. He became a primary
16:29
suspect in multiple murders involving young women in Las Vegas
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around this exact time. But this is the part of
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the legal system that I think completely infuriates the average
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person looking at true crime. Oh absolutely, the detectives strongly
16:42
suspect Peterson, they see the pattern, right, but no charges
16:46
are ever filed against him for Catherine's murder. He is
16:49
never publicly confirmed as her killer. Why. I mean, if
16:52
you have a guy who fits the profile perfectly and
16:54
he's tied to similar crimes, why not just arrest him,
16:58
put him in a courtroom and let a jury of
17:00
his peers decide.
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Speaker 2: Yeah. It feels like a massive administrative failure to the
17:04
lay person, but it's actually the bedrock of the adversarial
17:08
legal system. It comes down to the absolute rigidity of
17:12
the burden of proof and the terrifying finality of double jeopardy.
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Speaker 1: Explain double jeopardy for us in this context, because I
17:18
think people assume you can just keep trying someone until
17:20
you get it right.
17:21
Speaker 2: Right, but you can't. The Fifth Amendment prevents the state
17:24
from prosecuting a person twice for the exact same offense.
17:29
If a district attorney decides to just roll the dice
17:32
and takes Johnny Blake Peterson to trial based entirely on
17:36
circumstantial evidence, saying, you know, look, he killed other girls
17:39
in a similar way, so we must have killed Catherine,
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a competent defense attorney will dismantle that case in.
17:45
Speaker 1: An afternoon because there's no direct physical link exactly.
17:49
Speaker 2: The defense will stand up and point out that there
17:50
are no witnesses, there are no fingerprints, there is no
17:53
murder weapon, and there is certainly no confession tying Peterson
17:56
to this specific victim.
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Speaker 1: And if the jury agrees with the defense and acquits him.
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Speaker 2: If the jury says not guilty, the door closes forever.
18:04
That is double jeopardy. Even if let's say ten years later,
18:09
the police find a videotape of Peterson actually committing the crime,
18:12
or they find her missing jewelry hidden inside his wall,
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it does not matter. The state can never ever try
18:17
him for that murder again. He walks free with total immunity.
18:20
Speaker 1: Wow, that is a paralyzing amount of pressure for a prosecutor.
18:25
You essentially have one bullet in the chamber, and if
18:28
you miss, you grant the killer permanent amnesty. Exactly, so
18:32
they are forced to wait in this agonizing gray area,
18:36
just hoping the desert somehow yields a definitive piece of evidence.
18:40
Speaker 2: And while they're waiting, the predators are moving. You have
18:43
to remember the era of the nineteen seventies and eighties
18:46
was really the golden age of the highly mobile serial killer.
18:49
Look at Samuel Little for instance.
18:51
Speaker 1: Right, the Inner State killer.
18:52
Speaker 2: Right. He later confessed to multiple murders committed in Las
18:55
Vegas during the nineteen nineties.
18:57
Speaker 1: Samuel Little is really the ultimate manifestation of the blind
19:00
spot theory we were talking about earlier. He used the
19:03
interstate system not just as an escape route, but as
19:06
an actual hunting ground.
19:07
Speaker 2: He deliberately targeted marginalized women or women in highly transient environments,
19:12
and he constantly crossed state lines. He intuitively understood that
19:17
by committing a crime in Nevada and then just driving
19:19
to California, he was essentially severing the investigative threat.
19:23
Speaker 1: Because local police departments simply did not have the interconnected
19:26
databases required to track a behavioral signature across multiple states.
19:30
A murder in Vegas was just a local file sitting
19:32
on a desk. A murder in la was a totally
19:35
separate local file. Nobody was connecting the dots exactly.
19:39
Speaker 2: So the reality of Catherine's case is that the suspect
19:41
pool is practically infinite. It could be a local predator
19:44
like Peterson. It could be an interstate ghost like Samuel Little,
19:48
or it could be someone completely off the radar who
19:52
just got lucky and blended into the transient tourist population.
19:55
Speaker 1: And without a definitive physical link, the case just hits
19:59
a brick wall. Let's actually break down the exact anatomy
20:01
of that wall. Because nineteen eighty three policing was fundamentally
20:04
different from what we expect today.
20:06
Speaker 2: Yeah, the CSI effect has really warped our perception of
20:09
historical investigations. Today, a jury sits down and expects DNA
20:13
evidence to be presented in high definition. But in nineteen
20:16
eighty three, forensic DNA profiling did not exist in criminal
20:19
case work. It wasn't just rare, it was literally science fiction.
20:23
Speaker 1: So what were the actual tools on the belt. If
20:25
you strip away DNA entirely, what does a detective in
20:28
eighty three rely on.
20:29
Speaker 2: You have three primary pillars. First, eyewitness testimony, which as
20:34
we've established, did not exist at all in Captaine's deduction right.
20:38
Second you have confessions or informant testimony, which requires someone
20:42
close to the killer to actually break their silence. And third,
20:45
you have traditional physical evidence, primarily fingerprints, hair morphology, and
20:50
basic ABO blood typing.
20:52
Speaker 1: Let's talk about blood typing, because I feel like that
20:54
is a massive limitation that people forget about. If they
20:57
found blood at the scene, all they could say was,
20:59
you know, well, it's typo.
21:01
Speaker 2: Exactly, And typo blood is present in roughly forty five
21:04
percent of the human population. It is an exclusionary tool,
21:08
not an inclusionary one.
21:09
Speaker 1: Meaning you can rule people out, but you can't pin
21:11
it on one person.
21:12
Speaker 2: Right. If the suspect has Type A, you can clear them,
21:15
but if they have TYPO, they are just one of millions.
21:18
It lacks the microscopic specificity required to secure a conviction
21:22
in the absence of other stronger evidence.
21:25
Speaker 1: And regarding fingerprints, we go right back to the environmental incinerator,
21:30
the heat, the sand, the wind. I mean, fingerprints are
21:33
primarily composed of water, oils and salts left by human
21:36
skin in the Mahafi desert. Those oils evaporate and degrade
21:41
incredibly fast on porous surfaces, so the.
21:44
Speaker 2: Initial physical investigation is severely compromised from day one, and
21:48
then the most relentless enemy of all takes over the
21:52
passage of time. A cold case is not a static
21:55
object sitting in a box. It is subject to constant
21:58
active erosion. Deteriorate memories degrade drastically. An eyewitness who is
22:03
maybe sixty percent sure of a face in nineteen eighty
22:05
three is completely useless twenty years later. Furthermore, the human
22:09
network surrounding the crime degrays. Witnesses move away, suspects die
22:13
of natural causes, or crucially, people who might have tangential
22:16
knowledge of the crime retreat into silence.
22:18
Speaker 1: Fear is a powerful silencer. If you think your abusive
22:21
boyfriend committed a murder in nineteen eighty three, you might
22:24
be absolutely terrified to go to the police, and by
22:26
the time you feel safe enough to actually speak up,
22:28
decades have passed and your testimony is viewed as unreliable.
22:32
The truth just slowly erodes away. But while the evidence fades,
22:36
the psychological impact on the victim's family does the exact opposite.
22:40
It calcifies.
22:41
Speaker 2: The sociological term for this is ambiguous loss, and it
22:45
is fundamentally different from the grief associated with a known
22:49
death or a solve murder. How So, well, when a
22:51
killer is caught and incarcerated, society provides a very specific
22:55
ritual foreclosure. There is an arrest, a trial of verdict,
22:59
a sentence. There's a definitive ending to the narrative.
23:02
Speaker 1: But when a case freezes, the narrative is just violently suspended.
23:05
The families are trapped in this perpetual present tense. You're
23:08
constantly reevaluating the past. Did she mention a strange car
23:12
in the neighborhood, Did she seem anxious that morning you
23:15
are endlessly searching for a clue that you missed.
23:17
Speaker 2: And you are forced to endure an endless cycle of
23:20
uncelebrated milestones. Every birthday, every graduation, she missed, every holiday.
23:26
It is an open wound that is never allowed to
23:28
heal because the sheer uncertainty prevents the grieving process from
23:32
moving into the acceptance phase.
23:33
Speaker 1: I always think about it like a corrupted computer file.
23:36
You know the data is in there somewhere, the answers exist,
23:39
but the sequencing is completely scrambled. You can stare at
23:43
the raw code on the screen for forty years, but
23:45
without the right software, you can never reassemble the picture.
23:49
That is what living with an unsolved nineteen eighty three
23:51
case feels like. You are just waiting, hoping that someday
23:55
someone invents the software to decode the file.
23:58
Speaker 2: And the really remarkable to whist in the history of
24:01
forensic science is that the software was eventually invented. Yes,
24:05
this is where the narrative shifts from this crushing, inevitable
24:08
erosion to a state of unprecedented scientific hope.
24:12
Speaker 3: Exactly.
24:13
Speaker 1: Let's move out of the nineteen eighties and into the
24:15
DNA revolution, because what is happening right now in cold
24:18
case units across the country is honestly, it's nothing short
24:20
of miraculous. We are talking about modern forensic genealogy, and
24:24
it is completely upending the concept of a dead end.
24:27
Speaker 2: To understand the magnitude of this shift, we just need
24:30
to look at the cases that are suddenly cracking open.
24:32
Right in Las Vegas, cases that set dormant and filing
24:35
cabinets for decades are yielding definitive answers.
24:37
Speaker 1: The Stephanie Isaacson case is the perfect benchmark for this.
24:40
I think she was a fourteen year old girl murdered
24:43
in Las Vegas in nineteen eighty nine. The detectives in
24:47
eighty nine hit the exact same walls as the detectives
24:50
in eighty three, But recently her case was completely solved
24:54
using an amount of DNA that honestly defies comprehension.
24:57
Speaker 2: The technological leap is staggering. Let's actually quantify it. In
25:01
the early days of DNA testing, like in the late
25:03
nineteen eighties and nineties, you needed a substantial biological sample,
25:07
right like.
25:08
Speaker 1: A visible bloodstain or a large pool of saliva.
25:11
Speaker 2: Exactly today, advanced genomic sequencing can extract a comprehensive, searchable
25:16
genetic profile from as few as fifteen human cells.
25:19
Speaker 1: Fifteen cells, Wait, really, I mean you could shed fifteen
25:22
cells just by brushing your hand against a piece of fabric.
25:24
It is entirely invisible to the naked eye.
25:27
Speaker 2: Incredible.
25:27
Speaker 1: The killer in nineteen eighty nine had absolutely no conceptual
25:30
framework to understand that they were leaving behind a microscopic barcode.
25:34
Speaker 2: None whatsoever. But simply extracting the DNA is really only
25:38
step one. The traditional problem with DNA is that it
25:42
only works if the killer is already in the police database,
25:45
which is called Cody's. If the killer was never arrested
25:48
for a felony, their DNA just sits in the system
25:51
as an anonymous John do profile.
25:53
Speaker 1: Right, just a random string of letters and numbers with
25:55
no name attached.
25:56
Speaker 2: This is where forensic genetic genealogy fundamentally changed the game,
26:01
because it bypasses the police databases entirely. Investigators take that
26:06
anonymous John Doe DNA profile extracted from the crime scene
26:10
and they upload it to massive public genealogy databases. These
26:14
are the commercial sites that millions of ordinary people use
26:16
every day to research their family history or find out
26:19
their ethnic background.
26:20
Speaker 1: Let's really break down the mechanics of this, because it
26:22
is brilliant. How do you go from a distant cousin
26:25
spit in a tube to a killer's front door? Walk
26:27
me through the actual science of triangulation.
26:30
Speaker 2: It relies on measuring shared DNA, specifically utilizing a unit
26:34
of genetic measurement called centim morgans. When you upload the
26:37
killer's DNA, the database looks for matches, but it doesn't
26:41
need a direct match. That's the key, right, It is
26:44
looking for someone who shares a specific percentage of centi morgans,
26:47
indicating a shared common ancestor. Let's say the system flags
26:50
a hit a third cousin of the killer.
26:53
Speaker 1: A third cousin, they share what less than one percent
26:56
of their DNA.
26:57
Speaker 2: Roughlyzero point seven to eight percent. It is a time,
27:00
a tiny fraction. The third cousin has absolutely no idea
27:03
who the killer is. They've likely never even met, but
27:05
that point seven eight percent is enough for his skilled
27:08
genetic genealogists to establish.
27:09
Speaker 1: A baseline, so they have an anchor point. What happens
27:12
next they step.
27:12
Speaker 2: Out of the biology lab and into the historical archives.
27:16
The genealogists build the family tree backward these census records
27:19
from the nineteen twenties, marriage certificates, obituaries, and property deeds
27:23
to find the common great great grandparents shared by the
27:25
cousin and the unknown killer.
27:27
Speaker 1: They construct the entire canopy of the family tree.
27:30
Speaker 2: Exactly, and once they hit those common ancestors, they reverse
27:33
direction and build the tree forward, tracing every single descendant
27:37
down to the present day. They map out hundreds of individuals.
27:40
Then they apply the geographic and demographic filters of the crime.
27:44
Speaker 1: Okay, so they look at this massive tree of hundreds
27:46
of people and say, we need a male born between
27:49
nineteen fifty and nineteen sixty five who was physically living
27:52
in Las Vegas in February of nineteen eighty three.
27:55
Speaker 2: Precisely, And suddenly that tree of five hundred people narrows
27:58
down to maybe two brothers. The genealogists hand those two
28:02
names over to the police detectives. The detectives then do
28:05
old fashioned police work. They follow the suspect. They wait
28:08
for him to discard a coffee cup or a cigarette,
28:10
but they collect it, extract the DNA and match it
28:13
directly to the crime scene sample.
28:15
Speaker 1: It is the ultimate fusion of microscopic biology, historical archiving,
28:19
and traditional surveillance. And this exact process is what finally
28:23
identified the killer of Kim Bryant, the nineteen seventy nine case.
28:26
We compared to Catherine's earlier it is it is also
28:28
bringing names back to the nameless. You look at cases
28:31
like gwyn Marie's story, a victim who lay unidentified for
28:34
decades known only as a Jane do genetic genealogy restored
28:38
her identity. It is a profound restoration of accountability.
28:41
Speaker 2: It proves that anonymity is no longer guaranteed by time.
28:45
Speaker 1: But you know, I want to inject a dose of
28:47
harsh reality here, because as miraculous as the science is,
28:52
as incredible as fifteen cells and cent a morgans are,
28:55
this entire revolution hinges on a massive, terrifying physical vulnerability.
29:00
It relies entirely on the chain of custody.
29:02
Speaker 2: You are identifying the primary bottleneck in modern cold case
29:06
resolution right there. The science is flawless, but the physical
29:09
reality of the evidence is often incredibly precarious.
29:12
Speaker 1: Because if the detectives in nineteen eighty three did not
29:15
collect the evidence properly, or if the evidence locker flooded
29:18
in nineteen ninety five, or if the department purged old
29:21
files just to save space. All the supercomputers in the
29:24
world cannot generate a profile from dust.
29:26
Speaker 2: It is an agonizing reality for cold case units. Today
29:30
across the country, dedicated teams are pulling down these dusty
29:33
cardboard boxes from warehouse shelves. They are opening manilla envelopes
29:38
that haven't seen the light of day in forty years.
29:40
Speaker 1: I try to imagine the pressure of opening that box.
29:43
You are staring at the preservation methods of a completely
29:46
bygone era, and those.
29:48
Speaker 2: Methods were highly inconsistent in the nineteen eighties, before the
29:52
extreme fragility of DNA was fully understood, Biological evidence was
29:56
sometimes stored in sealed plastic bags. Oh no, yeah, plastic
30:00
trap's moisture, which encourages bacterial and mold growth, and mold
30:04
will absolutely obliterate DNA. Sometimes evidence was stored in unair
30:08
conditioned facilities where the relentless Nevada summer heat just continued
30:12
the thermal degradation process that originally started out in the desert.
30:16
Speaker 1: So it's a complete lottery. A detective opens a box,
30:18
and they either find a carefully preserved cotton swab in
30:21
a breathable paper on voloca swab that holds the definitive
30:24
answer to a forty year old nightmare, or they find
30:26
a degraded, useless stain.
30:28
Speaker 2: But when the evidence does survive, the results are explosive,
30:32
and the realization that these microscopic clues exist, that the
30:35
answers are literally waiting in a warehouse, has profoundly shifted
30:39
how society interacts with these mysteries, which really brings us
30:42
to the modern true crime phenomena.
30:44
Speaker 1: Yes, the culture surrounding unsolved crimes has evolved massively. Unsolved
30:49
cases exert this strange gravitational pull on the public imagination,
30:53
and I think it stems from a fundamental disruption of
30:55
human psychology. We are hardwired for narrative structure.
30:59
Speaker 2: We expect a three active structure. Right a crime occurs,
31:02
an investigation is launched, the perpetrator is held accountable, and
31:05
order is restored. That is the social contract of justice.
31:09
Speaker 1: When a case like Catherine Tyes freezes, that contract is broken.
31:12
The story just stops dead in the middle of the
31:14
second act. The murderer is never unmasked, The tension is
31:18
never resolved, and the mystery just lingers like a glitch
31:21
in the collective consciousness. And today the Internet has democratized
31:25
the investigation of that glitch.
31:26
Speaker 2: The rise of true crime documentaries intensive deep dives like
31:31
this one in dedicated online communities has created an absolute
31:35
army of amateur sleuths. Everyday, people who are completely disconnected
31:39
from the victim are spending hundreds of hours obsessively studying timelines.
31:44
Speaker 1: They are pulling digitized newspaper archives from nineteen eighty three.
31:48
They are cross referencing weather reports, looking up old property records,
31:52
and utilizing global searchable databases that the original detectives could
31:56
never have even imagined. They are looking for. The pattern
31:59
that we miss is a.
32:00
Speaker 2: Highly complex sociological phenomenon, and it operates as a major
32:04
double edged sword. On the negative side, there is a
32:07
distinct danger of misinformation. When you have thousands of people
32:11
speculating in an online echo chamber, wild theories can gain
32:15
traction very quickly.
32:16
Speaker 1: We've definitely seen that this.
32:17
Speaker 2: Can lead to the harassment of innocent people who are
32:19
tangentially related to the case, or it can overwhelm law
32:23
enforcement tip lines with noise rather than signal.
32:26
Speaker 1: Yeah, we have seen that happen repeatedly, where the Internet
32:29
hive mind misidentifies a suspect and just ruins a reputation.
32:33
But on the flip side, and this is where the
32:34
value truly lies. This massive public engine creates undeniable momentum.
32:40
Speaker 2: It applies pressure. Bureaucracies, by their nature, prioritize active current problems.
32:46
A forty year old file requires resources that a police
32:48
department might prefer to allocate elsewhere, but sustain public interest,
32:53
forces transparency, and keeps the file sitting right on the desk.
32:57
Speaker 1: And more importantly, it prevents the erasure of the victim.
33:00
When thousands of people are reading about Catherine Tie, she
33:03
remains a human being. She remains a seventeen year old
33:06
girl who is kind and dependable, a student at Chaparral
33:08
High School expecting an ordinary day. She does not devolve
33:11
into just a statistic or a dusty piece of paper
33:14
in an archive. The attention humanizes the history.
33:17
Speaker 2: And it serves as a collective societal refusal to accept
33:20
the premise that a killer can simply vanish without accountability.
33:24
The ongoing dialogue reinforces a vital philosophical tenet justice delayed
33:28
is still justice. The passage of four decades does not
33:31
diminish the moral imperative to balance the scales.
33:34
Speaker 1: So I ask you, the listener, to reflect on your
33:37
own engagement with these narratives. When we consume schintrime, are
33:41
we merely seeking the morbid thrill of a mystery, or
33:44
are we participating in a larger demand for resolution. By
33:47
keeping these names alive, we are actively rejecting the silence
33:51
of the desert.
33:52
Speaker 2: We are acknowledging that the victim's narratives did not end
33:55
in that desert. They are simply paused, waiting for the
33:58
science to catch up.
33:59
Speaker 1: We have covered immense ground today. We started with the
34:01
tragic disruption of an ordinary Monday in February nineteen eighty three.
34:06
We examined how the explosive growth of Las Vegas outpaced
34:09
its own infrastructure, creating literal and jurisdictional blind spots for predators.
34:14
Speaker 2: We analyze the brutal environmental reality of the Mohave Desert,
34:17
how heat, wind and time systematically dismantle physical evidence, and
34:20
we broke down the severe limitations of pre DNA investigative techniques.
34:24
Speaker 1: But we also illuminated the extraordinary pivot point we are
34:29
living in right now, the incredible microscopic power of forensic
34:33
genetic genealogy. We looked at how fifteen cells and a
34:37
distant cousin's family tree can reach across four decades to
34:41
pull a killer out of the shadows. It is a
34:44
testament to the sheer resilience of human innovation.
34:46
Speaker 2: It demonstrates that the definition of an unsolvable puzzle is
34:50
constantly shifting. What was completely impossible in nineteen eighty three
34:54
is routine today. The answers often exist, They just require
34:57
the right technological key.
34:59
Speaker 1: Which leaves us with one final, incredibly chilling thought to
35:02
carry with you, a thought built entirely on the mathematical
35:05
probability that the person who took Catherine T's life might
35:08
still be alive today. Think about the psychology of that individual.
35:12
For forty years, the world must have felt like a
35:14
triumph for them. They beat the system, They outsmarted the
35:17
nineteen eighty three detectives, They utilized the hostile desert to
35:20
their advantage, and they walked away into history completely untouched.
35:23
Speaker 2: They have lived an entire lifetime under the assumption of
35:26
permanent immunity.
35:27
Speaker 1: But imagine their reality right now, with every single new
35:31
cold case that hits the headlines, every time a killer
35:33
from the seventies or eighties is suddenly arrested because of
35:36
a genealogy database, that assumption of immunity fractures. They have
35:40
to wonder every single day. Is there a microscopic, invisible
35:44
flake of DNA preserved in a paper envelope sitting in
35:47
a Las Vegas evidence locker right this second? Is that
35:50
tiny sample acting as a silent ticking clock, just counting
35:54
down the minutes until a genealogist finally connects the branches
35:56
of their family tree. They thought that Nevada desert swallowed
35:59
their secrets forever, but the neon light of modern science
36:01
is finally systematically illuminating the absolute darkest corners. Keep asking
36:06
the hard questions, keep seeking the truth.