Forensic Files

Filmmaker lures victim to garage using a dating site

48 Hours

  • Apr 23, 2022
  • 3:55
  • Full Episode

Johnny Altinger went missing after going to meet a woman he met on a dating site, and clues lead investigators to a filmmaker's garage. Was Mark Twitchell planning a movie or a murder? #MarkTwitchell #TheDexterKiller #48hours

Crime. Social justice. Impact. "48 Hours" investigates the most intriguing crime and justice cases that touch on all areas of the human experience including greed and passion. "48 Hours," which premiered in 1988, has developed a rich history of original reporting and impact journalism that has helped exonerate wrongly convicted people, caused cold cases to be reopened and solved, and along the way changed lives.

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Brief Summary

Mark Twitchell, a filmmaker, murdered Johnny Altinger in 2008, using a dating ruse to lure him to a garage.

Key points

  • Mark Twitchell: The Filmmaker Killer. Mark Twitchell, an aspiring filmmaker, turned his dark fantasies into reality, leading to murder.
  • The Mysterious Disappearance. Johnny Altinger goes missing after planning to meet a woman named Jen from a dating site.
  • The Shocking Discovery. Investigators find Johnny Altinger's blood in Mark Twitchell's car, confirming their worst fears.

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