Copycat Killers

Dubbed the “Twilight Killers," two teenagers make headlines as Britain’s youngest double murderers.

James Cushing finds an axe and thinks it is destiny to follow in Lizzie Borden's footsteps.

Living near Las Vegas, Matt Baker watches the movie "Casino" and tries to mimic the gangsters.

Two men named Vincent Ellerbe and James Irons create a fatal fire in a token clerk's booth.

Two 12-year-old girls attempt to murder their classmate after learning about Slender Man.

Luka Magnotta confesses to a grotesque murder online, setting off an international manhunt.

Serial killer Jeffrey Dahmer's bizarre obsession with "The Exorcist III."

Michael Hernandez becomes obsessed with serial killers and decides to start his own killing spree.

When Gypsy Rose Blanchard tires of her mother's overbearing love, she creates a sinister plot.

A disgraced businessman Ari Squire attempts to start a new life by faking his own death.

Mark Baigent uses techniques learned from "CSI: Crime Scene Investigation."

Joe Post joins a gang that terrorizes a neighborhood to be like the criminals from "GoodFellas."

A drug addict mimics one of the most gruesome torture scenes in the "Saw" horror movies.

Tony Bagnato joins a fight club, but soon decides one member needs to pay the ultimate price.

A teenager with an addiction problem murders her grandfather after watching American Horror Story.

After watching the cult classic, a couple were inspired to mimic the actions in the movie.