Latest / Murder Files Unsealed / Idaho killer left behind 'catastrophic' evidence that fast-tracked his capture, investigators reveal

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Idaho killer left behind 'catastrophic' evidence that fast-tracked his capture, investigators reveal · Murder Files Unsealed

• 0:00
  Speaker 1: In Moscow, Idaho. Well, it's the kind of small college
• 0:03
  town where people just don't expect violent crime. Safety feels
• 0:06
  almost like a given.
• 0:07
  Speaker 2: Yeah, that's absolutely the perception. University Idaho town, tight knit community.
• 0:12
  Speaker 1: Exactly, which is why what happened in the early hours
• 0:15
  of November thirteenth, twenty twenty two was just so utterly shocking,
• 0:19
  so shattering.
• 0:19
  Speaker 2: Right, four young students, Madison Mogan, Kaylee Goncalves, Xana Kernodle,
• 0:24
  and Ethan Chapin brutally killed in their off campus house
• 0:28
  on King Road.
• 0:28
  Speaker 1: The reaction wasn't just local shock, it was national disbelief,
• 0:32
  wasn't it.
• 0:32
  Speaker 2: Oh completely, I mean, this is a town that hadn't
• 0:34
  had a murder in what seven years. The crime scene
• 0:36
  itself described as horrific, just sheer, brutal violence.
• 0:41
  Speaker 1: And that brutality immediately pointed to something personal, maybe rage filled.
• 0:44
  But investigators were well, they were basically staring into the void.
• 0:48
  Speaker 2: Initially a complete enigma. Yeah, the pressure cooker was on instantly,
• 0:52
  huge public demand for answers, but the police hit roadblocks
• 0:56
  right away.
• 0:57
  Speaker 1: What were the big ones?
• 0:58
  Speaker 2: Well, first, the reporting was delayed by hours. That's a
• 1:00
  huge loss of time. Second, no murder weapon found anywhere
• 1:04
  near the scene, big problem, and witnesses almost none, except
• 1:09
  for that terrifying but fleeting glimpse reported by one of
• 1:12
  the surviving roommates, Dylan Mortensen.
• 1:14
  Speaker 1: Right, the figure in black, masked, bushy eyebrows. Yeah, slipping
• 1:18
  out the back.
• 1:18
  Speaker 2: Door exactly, slipping out the sliding glass door on the
• 1:21
  basement level. But even that account, you know, it created
• 1:24
  confusion too. Was it targeted? Was it random? A party
• 1:28
  thing gone wrong?
• 1:29
  Speaker 1: And the tips just flooded in, didn't they some like
• 1:31
  twenty thousand, over.
• 1:32
  Speaker 2: Twenty thousand tips to Moscow ped State Police, the FBI.
• 1:37
  They were drowning in information, but none of it seemed
• 1:40
  to lead anywhere solid no forced entry, no clear motive,
• 1:43
  no known links.
• 1:45
  Speaker 1: It really felt like you could become a cold case
• 1:47
  almost immediately.
• 1:47
  Speaker 2: It had all the hallmarks destined to drag on for
• 1:50
  years potentially.
• 1:51
  Speaker 1: Okay, let's unpack this for you, our listener. Our mission
• 1:54
  today is to really dive deep into this case, but
• 1:57
  specifically through the lens of the science that cracked it, and.
• 2:00
  Speaker 2: Cracked it fast, unprecedented speed.
• 2:02
  Speaker 1: Really, we're going to trace how this baffling mystery which
• 2:06
  looked like it was going nowhere, turned into a definitive
• 2:09
  arrest in just six weeks, all thanks remarkably to a
• 2:14
  few microscopic.
• 2:15
  Speaker 2: Cells and one huge mistake by the killer.
• 2:17
  Speaker 1: We're talking about investigative genetic genealogy or IgG, and how
• 2:22
  a forgotten piece of evidence became the absolute key before
• 2:26
  we get into the forensics, the IgG, all of that.
• 2:28
  It's just so important we remember who we're talking about here.
• 2:32
  Speaker 2: Four young people, absolutely vital. These weren't just names in
• 2:34
  a case file. They had lives, plans, futures.
• 2:38
  Speaker 1: Madison Mogin and Kaylee Goncabs both twenty one, best friends
• 2:42
  forever practice eighth grade.
• 2:43
  Speaker 2: Yeah, Madison studying elementary education. Everyone mentions her smile. Kaylee marketing, adventurous,
• 2:49
  already had a job lined up in Texas. They just
• 2:51
  graduated early, actually, and were celebrating such.
• 2:54
  Speaker 1: A high point turned into the absolute lowest, and then
• 2:56
  the couple Santa Cronodle twenty.
• 2:58
  Speaker 2: Also marketing worked at a campus food pantry, described as
• 3:01
  having this quiet strength, and her boyfriend Ethan Chapin twenty.
• 3:05
  Speaker 1: Recreation management Sigma Chi Guy. The sources call him a
• 3:09
  six foot five gentle giant known for being loyal.
• 3:12
  Speaker 2: Steady, and their timeline just before it underscores how mundane,
• 3:16
  how normal everything was right.
• 3:18
  Speaker 1: Xan and Ethan got back late from a fraternity formal ordered.
• 3:21
  Speaker 2: Door dash around one five eight am, probably just settling in,
• 3:24
  relaxing like any college kids after a night out. And
• 3:27
  then a couple of hours later, Oh.
• 3:29
  Speaker 1: The attack when the officers finally got inside around twelve
• 3:33
  twenty pm the next day. Yeah, the scene must have
• 3:35
  been just unimaginable.
• 3:37
  Speaker 2: Horrific is the word used repeatedly. The sources detail extreme brutality.
• 3:42
  Victims found in pairs second and third floors, multiple devastating
• 3:47
  stab wounds.
• 3:48
  Speaker 1: And the weapon forensics deduced pretty early on, had to
• 3:50
  be sent something substantial.
• 3:52
  Speaker 2: Yeah, a large fixed blade knife, possibly something like a
• 3:55
  kabar designed for combat. Judging by the wounds it's ingested,
• 3:58
  you know, intent and force.
• 3:59
  Speaker 1: Was there evidence of a struttle?
• 4:00
  Speaker 2: There was. While it seems three victims maybe had less
• 4:03
  chance to react. Xenakernodle had clear defensive wounds on her arms.
• 4:07
  She fought back hard, and maybe the most chilling detail
• 4:11
  from the forensics there her fitness tracker. It actually showed activity,
• 4:15
  a heart rate spike placing the attack around four seventeen am.
• 4:20
  Speaker 1: That narrows the window significantly, but still no clue who did.
• 4:23
  Speaker 2: It exactly, still a ghost, and the scene itself offered
• 4:26
  few traditional clues.
• 4:28
  Speaker 1: No forced entry, suggesting the killer just walked in an
• 4:32
  unlocked door.
• 4:33
  Speaker 2: Probably the sliding glass door on the basement level, which
• 4:36
  lines up perfectly with what Dylan Mortenson, the surviving roommate, saw.
• 4:39
  Speaker 1: Later her account seeing that mask figure, bushy eyebrows slipping
• 4:44
  past her door downstairs. How did she react?
• 4:47
  Speaker 2: The source material suggests she froze total shock, and initially
• 4:52
  she sort of rationalized it, maybe thought it was just
• 4:54
  a party goer wandering through, which apparently wasn't totally uncommon
• 4:57
  right in college house. So she retreated to her trying
• 5:00
  to make sense of it, completely unaware of the absolute
• 5:03
  horror that had just taken place upstairs.
• 5:05
  Speaker 1: That delay, plus the sheer brutality, no weapon, It just
• 5:10
  sounds like an investigator's nightmare. How do you even start?
• 5:13
  Speaker 2: You focus on what you do have, and in this case,
• 5:16
  amidst all the missing pieces, there was one piece of
• 5:19
  physical evidence left behind that was well, it was everything.
• 5:24
  Huh Yeah, if the killer was meticulous about say, not
• 5:28
  leaving fingerprints or taking the weapon. They made one single oversight,
• 5:33
  and forensic experts basically all agree it was catastrophic for him.
• 5:37
  The nice sheath, the tan leather knife sheaf found right
• 5:40
  there on Madison Mogan's bed next to her body, buckled open.
• 5:44
  Speaker 1: Just left behind, like a smoking gun dropped at the scene.
• 5:48
  Speaker 2: So for the.
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  Speaker 1: Listener, why was this sheath so much more valuable than
• 5:51
  maybe a stray hair or something.
• 5:53
  Speaker 2: It boils down to the quality and crucially, the quantity
• 5:55
  of DNA found on it, Specifically on the button snap
• 5:58
  of the sheath. The killer left epithelial cells skin cells,
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  but not just a few. We often talk about touch DNA,
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  maybe scraping up ten twenty cells.
• 6:07
  Speaker 1: If you're lucky right, very trace amounts.
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  Speaker 2: Usually, this sample was described as a jackpot. Sources say
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  hundreds of times more DNA than typical touch DNA, A
• 6:15
  pristine sample from a single male contributor.
• 6:17
  Speaker 1: Hundreds of times more? Is that is that common?
• 6:20
  Speaker 2: Highly unusual, almost miraculous For investigators think about it, less
• 6:25
  chance of degradation, no mixture issues, just a clean, robust
• 6:29
  sample from one person. It meant they could do really
• 6:32
  advance sequencing without the DNA falling apart, priceless really in
• 6:36
  forensic terms.
• 6:37
  Speaker 1: So they have this perfect DNA sample. Step one have
• 6:40
  to be codis right the national.
• 6:41
  Speaker 2: Database exactly, run it through the combined DNA index system.
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  See if this profile matches any known offenders or arrestees
• 6:48
  in the system. Standard procedure. Nothing, a complete blank because
• 6:53
  the person responsible, Brian Koberger, had absolutely no prior criminal record,
• 6:57
  not even a minor offense that would have put his
• 6:59
  DNA in the system.
• 7:00
  Speaker 1: Wow. So even with a jackpot DNA sample, traditional methods.
• 7:03
  Speaker 2: Hit a wall, a dead end, and that's the pivot point.
• 7:06
  That lack of a code is hit is what forced
• 7:08
  investigators to think outside the box to move towards this newer,
• 7:12
  high tech approach.
• 7:13
  Speaker 1: Which leads them to authrom right.
• 7:15
  Speaker 2: Authroom down in Texas, a lab specializing in exactly this
• 7:19
  kind of situation, Advanced DNA sequencing and investigative genetic genealogy IgG.
• 7:24
  Speaker 1: The codis failure basically dictated the next step. They knew
• 7:28
  they had the guy's DNA, they just couldn't put a
• 7:31
  name to it using.
• 7:31
  Speaker 2: The old tool They needed a new toolbox.
• 7:33
  Speaker 1: And this is where it gets incredibly fascinating how a
• 7:36
  few skin cells on a button snap in Idaho somehow
• 7:40
  connect to a family tree stretching back to Pennsylvania. It's
• 7:43
  a mind bending leap.
• 7:44
  Speaker 2: It really is. It showcases the power of this technology.
• 7:47
  Speaker 1: Okay, so IgG, we hear that term thrown around a
• 7:51
  lot now, especially after cases like the Golden State Killer.
• 7:54
  But let's break it down for our listeners. What exactly
• 7:57
  is investigative genetic genealogy? How is it different from you know,
• 8:01
  regular CSI stuff?
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  Speaker 2: Right? So IgG is basically a mix a hybrid. It
• 8:06
  combines cutting edge forensic DNA analysis with good old fashioned
• 8:10
  genealogical research like tracing family trees.
• 8:13
  Speaker 1: Okay, but what's the key difference in the DNA part.
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  Speaker 2: It's all about what part of the DNA you're looking at.
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  Traditional forensics, the kind use for Cody's relies on something
• 8:21
  called STRs short tandem repeats ftrs.
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  Speaker 1: How should we think about those like specific markers?
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  Speaker 2: Think of them like checking a few specific ID numbers
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  on a long string. They're short repeating sequences of DNA.
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  STRs are great for direct matches parent child, sibling, or
• 8:40
  matching a suspect directly to crime scene evidence. If their
• 8:42
  profile is already in codis Okay, direct hits exactly, but
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  they only look at maybe twenty or so locations in
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  the genome. Because of that, they're pretty much useless for
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  finding distant relatives like a second or third cousin, let
• 8:54
  alone fourth or fifth. The signal gets too weak. They
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  just can't bridge those generational gaps.
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  Speaker 1: STRs are for close family or direct matches. IgG uses
• 9:03
  something different.
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  Speaker 2: Though precisely IgG uses SNPs Single nucleotide polymorphisms SNPs.
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  Speaker 1: Okay, what are those?
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  Speaker 2: Smps? Are tiny single letter variations in your DNA code,
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  a C instead of a T at a specific point
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  for example. We all have millions of them and they're
• 9:19
  passed down through families. Instead of looking at just twenty
• 9:21
  spots like STRs, SMP testing looks at hundreds of thousands,
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  sometimes millions, of these points across your entire genome.
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  Speaker 1: Wow, okay, that sounds way more detailed.
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  Speaker 2: It is. It gives you this incredibly detailed map, and
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  that detail is what allows you to find those much
• 9:36
  weaker genetic signals shared with distant relatives. Even a third
• 9:39
  or fourth cousin will share small identifiable segments of the smps.
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  Speaker 1: So the jackpod DNA sample from the sheath was good
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  enough for this detailed SMP analysis.
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  Speaker 2: Absolutely authrom was able to generate a really comprehensive SNP
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  profile from it. And once they have that profile, they
• 9:56
  upload it somewhere, right, but not just anywhere. They upload
• 9:59
  the anonymised profile file to specific public or semi public
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  consumer DNA databases. GEDMatch is a well known one.
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  Speaker 1: Why those databases and not say Ancestry DNA or twenty
• 10:09
  three I ME directly.
• 10:10
  Speaker 2: It's about user consent. Databases like gd match specifically allow
• 10:14
  users to opt in to let law enforcement compare profiles
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  against their data for identifying suspects or remains. Millions of
• 10:21
  people looking for relatives have uploaded their data and checked
• 10:23
  that box. Ancestry and twenty three a ME have much
• 10:26
  stricter policies against law enforcement searches without a warrant for
• 10:29
  specific person.
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  Speaker 1: Okay, so they're searching against people who've agreed to potentially
• 10:33
  help law enforcement, and the system looks for shared DNA.
• 10:37
  How do they measure how closely related someone is?
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  Speaker 2: It's measured in a unit called centi morgans or CM.
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  You can think of centi morgans like units of shared
• 10:47
  genetic inheritance. The more centi morgans you share with someone,
• 10:51
  the closer the likely relationship.
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  Speaker 1: Can you give an example, sure like.
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  Speaker 2: You might share around seventeen hundred cem with a parent
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  or child, maybe to hundred three hundred and fifty cnm
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  with a second cousin. A third cousin might only share,
• 11:04
  say twenty to one hundred cnm, often in smaller pieces.
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  The algorithms analyze the amount and location of shared cm
• 11:11
  to predict possible relationships second cousin, third cousin, once removed,
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  et cetera.
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  Speaker 1: And they gives the genealogist their starting point exactly.
• 11:18
  Speaker 2: Olfham's team got matches relatively quickly in this case, probably
• 11:22
  in the second or third cousin range. But that doesn't
• 11:24
  give you the suspects name. It just gives you a
• 11:26
  few distant relatives.
• 11:28
  Speaker 1: Then comes the hard part, the actual genealogy.
• 11:30
  Speaker 2: That's the detective work. The genealogists take those distant matches
• 11:34
  and start building family trees. They have to work backward
• 11:37
  in time, using public records, birth certificates, death certificates, census records,
• 11:42
  marriage licenses, obituaries, old newspapers, anything they can find to
• 11:46
  identify the common ancestors shared by those matches.
• 11:49
  Speaker 1: That sounds incredibly painstaking.
• 11:51
  Speaker 2: It is. You're digging through potentially centuries of records. But
• 11:55
  once they find that common ancestor or ancestral couple.
• 11:59
  Speaker 1: They have to work forward again.
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  Speaker 2: Right, trace all the descendants down through the generations, building
• 12:04
  out the family tree towards the present day, trying to
• 12:07
  pinpoint the specific branch and eventually the individual whose genetic
• 12:11
  profile matches the crime scene sample. You have to account
• 12:14
  for name changes, people moving, adoptions. It's complex.
• 12:18
  Speaker 1: How do they handle things like adoption or name changes.
• 12:20
  Speaker 2: It takes skill. They cross reference everything. Sensus data might
• 12:25
  show name changes after marriage. Sometimes property records help for adoptions.
• 12:30
  They might look for non identifying info or use purely
• 12:33
  genetic clues from other matches to figure out the biological line.
• 12:36
  It's part science, part historical investigation.
• 12:39
  Speaker 1: And in the Idaho case, they apparently did this remarkably fast.
• 12:43
  Speaker 2: Astonishingly fast. The sources say. Authorm's team worked right through
• 12:47
  Thanksgiving in twenty twenty two and were able to narrow
• 12:50
  it down to a single paternal line originating in Pennsylvania
• 12:53
  very quickly. That speed was a huge breakthrough.
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  Speaker 1: What's really striking here is how this genetic lead pointing
• 13:00
  to Pennsylvania meshed perfectly with other leads the police were
• 13:03
  developing at the same time. Wasn't just IgG in isolation.
• 13:07
  Speaker 2: No, it was a convergence, a perfect storm of evidence.
• 13:09
  While the genealogists were tracing the family tree, East police
• 13:13
  were looking at surveillance Tinia exactly. They had found footage
• 13:16
  of a distinctive white Hyundai Lantras speeding away from the
• 13:19
  King Road area around four twenty am, just minutes after
• 13:22
  that fitness tracker pinged. They eventually tied that car, specifically
• 13:27
  to Coburger his twenty eleven model.
• 13:29
  Speaker 1: Okay, the car, what else?
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  Speaker 2: Cell phone data huge. They subpoened records and found Coburger's
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  phone had pinged cell towers near the King Road house
• 13:39
  twelve times in the months leading up to the murders.
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  Speaker 1: Twelve times suggest reconnaissance, maybe stalking.
• 13:45
  Speaker 2: It certainly points that way, and crucially, his phone also
• 13:49
  pinged near the house during the estimated time window of
• 13:52
  the murders themselves, although it seemed to be turned off
• 13:55
  or an airplane mode for critical period right around four
• 13:58
  seventeen am.
• 14:00
  Speaker 1: Car the phone pings suggesting prior interest in presence during
• 14:04
  the crime, and the IgG pointing to his family line,
• 14:07
  all converging on Brian Coburger.
• 14:09
  Speaker 2: All pointing directly at him, a PhD student living just
• 14:12
  ten miles away in Pullman, Washington.
• 14:15
  Speaker 1: But IgG, even with this convergence, is still technically just
• 14:17
  a lead. Right, it gives probable cause, But for conviction
• 14:20
  you need something more direct.
• 14:22
  Speaker 2: That's a critical point. IgG points you to the likely
• 14:25
  suspector family. But to make it stick in court, especially
• 14:28
  for a murder charge, you need a direct comparison. You
• 14:31
  need DNA from the suspect himself to match the crime
• 14:34
  scene DNA using that traditional str testing.
• 14:37
  Speaker 1: Method, the gold standard for court, which leads us to
• 14:40
  the famous trash poll.
• 14:41
  Speaker 2: Exactly the confirmatory test. Investigators needed a legally obtained sample
• 14:46
  of Coburger's DNA that he had abandoned, so.
• 14:49
  Speaker 1: They waited until he went home to Pennsylvania for the holidays.
• 14:52
  Speaker 2: Right they set up surveillance on his family's home in Albrightsville, Pennsylvania.
• 14:57
  It was a carefully planned operation, working with the FBI
• 15:01
  and local PA authorities. They needed to collect his trash
• 15:04
  without him knowing, and without contaminating.
• 15:06
  Speaker 1: The sample, and they waited for trash day under the.
• 15:08
  Speaker 2: Cover of darkness, likely early morning. On trash day, agents
• 15:13
  collected bags put out on the curb by the Coburger family.
• 15:16
  They sorted through it looking for items likely to have
• 15:19
  his DNA, and they found a pizza crust and a napkin,
• 15:22
  among other things, items likely handled directly by him. They
• 15:26
  rushed those back to the lab and the result definitive.
• 15:29
  The DNA extracted from the trash items was compared to
• 15:32
  the DNA from the knife sheath. The lab reported a
• 15:35
  match probability exceeding five point three octilian.
• 15:38
  Speaker 1: To one octilium. That's a number with twenty seven zeros.
• 15:40
  Speaker 2: Right, basically statistically irrefutable. It's a number so astronomically large
• 15:46
  it eliminates any possibility of a coincidental match. That was
• 15:50
  the final piece they needed.
• 15:51
  Speaker 1: Why wasn't just the car evidence enough or the phone pings?
• 15:55
  Couldn't they arrest him based on that?
• 15:56
  Speaker 2: They probably could have arrested him based on the convergence,
• 15:59
  but it would have been a weaker case relying on
• 16:01
  circumstantial evidence. Defense attorneys are very good at poking holes
• 16:06
  in car sightings. Was it definitely his lantra or phone pings.
• 16:10
  Maybe he lent his phone out. The DNA mats from
• 16:13
  the sheath confirmed by the trash pole. DNA was direct
• 16:17
  physical biological evidence linking him specifically to the crime scene.
• 16:22
  It's much harder to argue against.
• 16:24
  Speaker 1: So IgG found the needle in the haystack. Yeah, trash
• 16:26
  pule confirmed it was the right needle.
• 16:28
  Speaker 2: Perfectly put. IgG provided the who. The trash pole provided
• 16:32
  the legal certainty needed for the charges.
• 16:34
  Speaker 1: And there was also that odd behavior noted during the
• 16:36
  surveillance before.
• 16:37
  Speaker 2: The trash pole, right, Yeah, that was mentioned in the sources.
• 16:39
  He was apparently seen wearing surgical gloves while taking out
• 16:43
  his own family's trash from inside the kitchen.
• 16:45
  Speaker 1: Surgical gloves to take out the kitchen trash.
• 16:48
  Speaker 2: It struck investigators as extremely odd, almost paranoid, like he
• 16:53
  was maybe hyper aware of leaving DNA evidence even in
• 16:57
  his own garbage. It just added to their certainty they
• 17:00
  were on the right track.
• 17:01
  Speaker 1: So who was Brian Christopher Coburger a thirty year old
• 17:05
  PhD student in criminology at Washington State University just across
• 17:09
  the state line in Pullman. What do we know about him? Personally.
• 17:13
  Speaker 2: The sources paint a picture of someone well, a bit awkward,
• 17:16
  maybe socially isolated, but highly intelligent. There were reports he
• 17:20
  lost a significant amount of weight, like one hundred pounds
• 17:22
  back in high school and sort of remained introverted in.
• 17:25
  Speaker 1: His field of study, criminology. That feels almost two on
• 17:29
  the nose.
• 17:29
  Speaker 2: It's deeply unsettling, isn't it. He had a bachelor's in psychology,
• 17:33
  then a master's in criminal justice from Dissales University before
• 17:36
  starting his PhD at WSU. He was even teaching undergrad
• 17:39
  classes and things like forensic psychology.
• 17:41
  Speaker 1: And his master's ces his topic.
• 17:43
  Speaker 2: Decision making in Criminals an assessment of the choice structuring
• 17:46
  properties of the environment. He was literally researching the mindset
• 17:50
  of offenders, how they choose victims, how they plan crimes.
• 17:53
  Speaker 1: It sounds like he was studying the playbook for the
• 17:56
  crime he allegedly committed. Was there any suggestion this was
• 17:59
  some kind of twisted academic exercise for him or just
• 18:02
  pure narcissism.
• 18:04
  Speaker 2: It's hard to say definitively from the outside, but the
• 18:06
  sources definitely point to a fixation. He wasn't just studying
• 18:10
  it academically. He was actively trying to engage with the
• 18:13
  criminal mind. Also, he posted surveys on Reddit specifically aimed
• 18:18
  at ex convicts, asking very direct questions like why did
• 18:21
  you choose that victim? How did you prepare? How did
• 18:23
  you approach them? Oh, and maybe even more chilling, unsealed
• 18:27
  homework assignments from his studies reportedly described a scenario with
• 18:31
  eerie parallels, a detailed, gruesome stabbing scene, blood spatter. It
• 18:37
  really suggests at minimum a deep preoccupation, maybe even a
• 18:40
  rehearsal in his mind.
• 18:41
  Speaker 1: Yet, despite this academic focus on crime, the sources stress
• 18:45
  he had no actual criminal past himself.
• 18:48
  Speaker 2: None whatsoever, no criminal record, no known history of stalking,
• 18:52
  although the phone pinks certainly raise questions there, and most importantly,
• 18:57
  no known prior connection, no personal link to Madison, kaylee'
• 19:02
  Xana or Ethan.
• 19:04
  Speaker 1: That's the part that's just so baffling, this disconnect. A
• 19:07
  student of crime, no history of violence apparently commits this
• 19:11
  incredibly brutal personal act against strangers.
• 19:15
  Speaker 2: Investigators grappled with that immediately. How does someone like that
• 19:18
  just snap or was it planned meticulously over time? Where
• 19:22
  did this come from?
• 19:23
  Speaker 1: Let's track his movements after the murders. He drove home
• 19:26
  for the winter break right cross country.
• 19:28
  Speaker 2: Yeah, he drove from Washington State to Pennsylvania with his father,
• 19:31
  completely unaware, presumably that FBI surveillance teams were tracking their
• 19:36
  entire journey.
• 19:37
  Speaker 1: That must have been a tense operation for law enforcement, just.
• 19:39
  Speaker 2: Waiting, absolutely a massive coordinated effort. They needed that DNA
• 19:44
  confirmation from the trash pullback in PA before they could
• 19:47
  make the arrest. They couldn't risk tipping him off too early.
• 19:49
  Speaker 1: There was that detail about them being pulled over in
• 19:51
  Indiana too.
• 19:53
  Speaker 2: Right, pulled over by Indiana State Police for tailgating. Totally
• 19:56
  unrelated to the FBI surveillance, but it was crucial because
• 19:59
  the the least dashcam footage confirmed it was Coburger confirmed,
• 20:03
  the car's appearance, put him at a specific place in time,
• 20:06
  more corroborating evidence, and then the arrest itself.
• 20:09
  Speaker 1: December thirtieth, twenty twenty two, pre dawn raid.
• 20:12
  Speaker 2: A SWAT team went into the family home in Albrightsville
• 20:14
  around three am, and, confirming what surveillance saw earlier.
• 20:18
  Speaker 1: The ven him with gloves on handling trash.
• 20:20
  Speaker 2: Reportedly, Yeah, found him in the kitchen wearing gloves bagging trash.
• 20:23
  It was a final strange detail did you resist? No,
• 20:27
  surrendered without resistance, And his demeanor afterwards was described as odd, calm,
• 20:33
  maybe detached, even a bit arrogant. According to some reports,
• 20:36
  he supposedly discussed the case almost hypothetically and never confessing,
• 20:39
  but showing this strange academic curiosity about it all, which brings.
• 20:42
  Speaker 1: Us squarely to what the source is called the case's
• 20:44
  central black hole. The motive, Yeah, why did he do it?
• 20:48
  Speaker 2: Even after the arrest, after the conviction, that question limbs
• 20:52
  Large investigators turned his life inside out, digital forensics, financials, interviews,
• 20:59
  and found nothing, no manifesto, no clear grudge against the victims,
• 21:04
  no obvious trigger.
• 21:05
  Speaker 1: The prosecutor himself admitted they were mystified, right yeah.
• 21:08
  Speaker 2: Late account of prosecutor Bill Thompson stated publicly something like
• 21:12
  we remained mystified by his motives. He emphasized there was
• 21:15
  just no evidence Coburger had a history of violence or
• 21:18
  was some kind of budding serial killer. They'd missed. It
• 21:20
  just didn't fit any typical profile.
• 21:22
  Speaker 1: So the science, the IgG, the DNA gave them the
• 21:26
  who with almost absolute.
• 21:27
  Speaker 2: Certainty, right, rock solid identity, But.
• 21:30
  Speaker 1: The why remains completely unanswered, a chilling void, and.
• 21:34
  Speaker 2: That tension between the scientific certainty and the psychological ambiguity.
• 21:38
  It really shaped how the legal process ultimately played out.
• 21:41
  So the case moved towards trial, but ultimately it didn't
• 21:43
  get there. It reached a conclusion that brought legal finality,
• 21:46
  but maybe not emotional closure for everyone.
• 21:49
  Speaker 1: Right on July twenty third, twenty twenty five, Brian Coberger
• 21:52
  pled guilty.
• 21:53
  Speaker 2: He pled guilty to four counts a first degree murder
• 21:56
  and one count of felony burglary.
• 21:58
  Speaker 1: And this was part of a plea deal correct to
• 22:00
  avoid the death.
• 22:00
  Speaker 2: Penalty exactly the prosecution had initially sought the death penalty.
• 22:05
  The deal was he pleads guilty, accepts responsibility, waives all
• 22:09
  rights to appeal, and in return, he receives four consecutive
• 22:13
  life sentences without the possibility of parole.
• 22:16
  Speaker 1: So he'll spend the rest of his life in prison.
• 22:18
  Speaker 2: Guaranteed, guaranteed, no appeals, no chance of getting out.
• 22:22
  Speaker 1: What were the implications of that plea deal. It avoided
• 22:25
  a long, potentially traumatic trial.
• 22:28
  Speaker 2: Massively, So a trial would have meant months of graphic testimony,
• 22:32
  forensic details being picked apart, it would have been incredibly
• 22:35
  painful for the victims' families to sit through. Given the
• 22:38
  strength of the DNA evidence that five point three octilian
• 22:42
  to one match, the defense really had very little room
• 22:45
  to maneuver. A guilty verdict seemed almost inevitable.
• 22:48
  Speaker 1: So the plea spare the families that ordeal.
• 22:50
  Speaker 2: Yes, but the flip side is by pleading guilty without
• 22:54
  making any statement, without offering any explanation.
• 22:56
  Speaker 1: He took the motive with him.
• 22:58
  Speaker 2: Exactly the waw the question that plagued investigators and the
• 23:02
  public remained unanswered in any official capacity. The plea effectively
• 23:07
  sealed that black hole shut. From a legal perspective.
• 23:10
  Speaker 1: The sentencing hearing must have been incredibly.
• 23:12
  Speaker 2: Emotionally, deeply emotional. You had victim impact statements Steve Goncalves,
• 23:17
  Kayley's father expressing just raw fury, saying Coburger wasn't even
• 23:22
  a person in his eyes anymore.
• 23:23
  Speaker 1: And Dylan Mortenson, the surviving roommate.
• 23:26
  Speaker 2: Her testimony was heartbreaking, speaking about survivor's guilt, the immense
• 23:31
  burden she carries knowing she saw him, even if she
• 23:33
  didn't understand what was happening at the time.
• 23:35
  Speaker 1: There was also that whole conflict over the King Roade
• 23:37
  house itself wasn't there.
• 23:38
  Speaker 2: Yeah, that became a real point of contention. The University
• 23:41
  of Idaho, which owned the property, wanted to demolish it,
• 23:44
  but the Goncalves family especially fought against it.
• 23:47
  Speaker 1: Why what was their reasoning?
• 23:48
  Speaker 2: They argued it still held potential evidentiary value even though
• 23:52
  the scene had been processed. They also felt demolishing it
• 23:56
  was premature and incredibly painful, erasing a site that, while
• 23:59
  her terrific, was tied to their daughter's last moments. They
• 24:03
  even tried to sue to.
• 24:04
  Speaker 1: Stop it, but the demolition went ahead.
• 24:06
  Speaker 2: It did despite the family's pleas. The house was torn
• 24:09
  down in December twenty twenty three. The university cited I
• 24:13
  believe wanting to aid community healing and prevent the site
• 24:16
  from becoming a spectacle. It's now planned to be a
• 24:19
  memorial garden.
• 24:20
  Speaker 1: Different families probably had different feelings about that and the
• 24:22
  plea itself.
• 24:23
  Speaker 2: Absolutely Stacy chapin Ethan's mother was quoted as finding an
• 24:27
  unexpected piece in the finality of the plea deal. For her,
• 24:32
  ending the legal process seemed more important than pursuing answers
• 24:35
  that might never come. It highlights how complex grief and
• 24:38
  closure are.
• 24:39
  Speaker 1: Now, let's loop back to the technology that made the
• 24:42
  swift arrest possible. IgG. Its success here was undeniable, but
• 24:46
  it really put the spotlight back on the ethical debates
• 24:49
  surrounding it, didn't it.
• 24:50
  Speaker 2: Oh? Absolutely, This case became a major example of both
• 24:53
  the power and the potential pitfalls of IgG. The biggest
• 24:57
  concern is always.
• 24:58
  Speaker 1: Privacy, privacy of a the suspect.
• 25:01
  Speaker 2: Not just the suspect, but all of their relatives whose
• 25:04
  DNA is in these databases. Critics argue that when law
• 25:08
  enforcement searches ge mematch or similar sites, they're essentially conducting
• 25:12
  a genetic lineup involving potentially hundreds or thousands of innocent
• 25:17
  people who happened to share DNA with a suspect.
• 25:20
  Speaker 1: People who uploaded their DNA just to find their own
• 25:24
  family history, not to be part of a criminal probe.
• 25:26
  Speaker 2: Exactly did they truly give informed consent for their most
• 25:29
  personal information to be used this way? It feels like
• 25:32
  a loophole to some, using familial ties to identify someone
• 25:35
  who isn't even in the database themselves.
• 25:37
  Speaker 1: That's the genetic dragnet argument, right, casting a wide net
• 25:40
  that pulls in innocent relatives precisely.
• 25:42
  Speaker 2: And there's also the risk, however, small of errors in
• 25:45
  the genealogical research building family trees from old records isn't foolproof.
• 25:49
  You could potentially misidentify someone or implicate the wrong family
• 25:53
  grant if the research isn't meticulous.
• 25:55
  Speaker 1: Did Coberger's defense challenge the use of IgG?
• 25:58
  Speaker 2: They challenged it vigorously. They argued the IgG search itself
• 26:02
  and crucially, the subsequent trash poll violated his Fourth Amendment
• 26:06
  rights against unreasonable searches and seizures. They claimed it was
• 26:10
  an unconstitutional invasion of his genetic privacy and that the
• 26:14
  trash poll was based on this potentially flawed, invasive technique.
• 26:18
  Speaker 1: But the courts didn't agree.
• 26:19
  Speaker 2: No, the courts ultimately upheld both the IgG process as
• 26:23
  used here and the legality of the trash pole. They
• 26:27
  relied on existing legal precedent. What was the reasoning for
• 26:30
  the IgG? They essentially said the searches were conducted on
• 26:33
  databases where users had opted in to law enforcement matching.
• 26:36
  For the trash pole, they fell back on the long
• 26:39
  established legal principle that once you put your trash out
• 26:42
  on the curb for collection, you've legally abandoned it, you
• 26:45
  no longer have a reasonable expectation of privacy and its
• 26:48
  contents under the Fourth Amendment.
• 26:50
  Speaker 1: So legally the police were entitled to take it and
• 26:52
  test it correct.
• 26:53
  Speaker 2: That ruling was critical. It meant the DNA evidence, the
• 26:56
  cornerstone of the case, was admissible.
• 26:58
  Speaker 1: So while IgG was validated legally in this specific instance,
• 27:02
  the case definitely fueled the ongoing debate about whether we
• 27:05
  need clearer laws, stricter regulations, perhaps federal oversight to govern
• 27:10
  how and when this powerful technology can be used.
• 27:12
  Speaker 2: Without a doubt, it solidified IgG's place as a game
• 27:16
  changing tool for law enforcement, but it also amplified the
• 27:19
  calls for careful ethical guardrails to prevent misuse or overreached
• 27:24
  down the line hashtag tag outro so.
• 27:27
  Speaker 1: When you boil it down. This horrific crime in Idaho,
• 27:30
  which seemed destined to become a frustrating cold case, was
• 27:33
  solved with incredible speed less than two months from the
• 27:36
  crime to the arrest, and it all hinged on one single,
• 27:39
  almost unbelievable mistake.
• 27:41
  Speaker 2: That forgotten knife sheath. The killer's catastrophic blunder, as the
• 27:44
  experts called it, It provided that perfect high quantity DNA sample.
• 27:48
  Speaker 1: A sample that was useless for traditional code as searches
• 27:51
  because he wasn't in the system right, but it.
• 27:52
  Speaker 2: Was perfect for investigative genetic genealogy. Oftim's work built the
• 27:56
  family tree. The genealogists traced it down, and suddenly this
• 28:00
  ghost had a name and a location, and.
• 28:03
  Speaker 1: That lead converged perfectly with the other evidence, the white alantra,
• 28:07
  the cell phone pings showing prior visits and presents during
• 28:10
  the murders.
• 28:11
  Speaker 2: It became an incredibly strong, multi pronged case very quickly.
• 28:15
  The DNA from the sheath was like.
• 28:17
  Speaker 1: The lock, and IgG, combined with the genealogy, was the
• 28:21
  key that unlocked it, pointing straight to Brian Coberger, confirmed
• 28:25
  of course by the trash pool DNA.
• 28:27
  Speaker 2: Yeah, the case is really a stunning testament to how
• 28:30
  far forensic science has evolved. IgG's ability to bridge that
• 28:34
  gap when traditional methods fail is just revolutionary.
• 28:39
  Speaker 1: But it also leaves us with this lingering tension, doesn't it?
• 28:42
  Speaker 2: It really does. This raises a significant question. I think
• 28:45
  the science gave us near perfect certainty about who committed
• 28:48
  these terrible acts. The DNA match is irrefutable.
• 28:51
  Speaker 1: But we're still completely in the dark about why exactly.
• 28:55
  Speaker 2: The prosecutor himself said there was no evidence of predisposition.
• 28:59
  Yet here we have a man studying the criminal mind,
• 29:01
  studying decision making in crime, who then commits this brutal act,
• 29:05
  apparently without any clear motive investigators could uncover.
• 29:08
  Speaker 1: So here's something for you, the listener, to think about.
• 29:11
  If the science can tell us with absolute certainty who
• 29:13
  did it, but we never truly understand the why Was
• 29:16
  it a thrill kill, a twisted experiment, a random impulse.
• 29:20
  Does that lack of motive, that absence of understanding the
• 29:23
  human element behind the monstrosity prevent true closure even when
• 29:27
  legal justice like life sentences has been served. It's that
• 29:31
  gap between scientific truth and human comprehension that this case
• 29:34
  leaves us grappling with.