Teens inspired by ‘Scream’ recorded ‘first kill’ plot before stabbing classmate to death

Two teens turned their obsession with slasher films into a deadly real-life nightmare.

In September 2006, 16-year-old Cassie Jo Stoddart, who was house-sitting for relatives in Pocatello, Idaho, was found stabbed to death inside the property. Investigators in the small town focused on the last three people who saw the popular teen alive: classmates Brian Draper and Torey Adamcik, along with her boyfriend, Matt Beckham. But the discovery of a buried videotape revealed a disturbing truth.

Stoddart’s...