The Dexter Killer: How Mark Twitchell Turned Fiction Into Murder
In 2008, an aspiring filmmaker in Edmonton, Alberta, rented a garage, posed as a woman on a dating site, and began living out his obsession with the TV show Dexter. One man escaped. The next did not.
This episode examines the methodical crimes of Mark Twitchell—the man the media called the Dexter Killer—including the online luring of Gilles Tetreault and the murder and dismemberment of Johnny Altinger, the recovered “SK Confessions” document, the trial, and the thin line between Twitchell’s short films and real-life violence.
Content warning: This episode contains graphic descriptions of…
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