Brooke Preston was fatally stabbed by her roommate Randy Herman Jr. in 2017. Then, he claimed that he had been sleepwalking while committing the crime.

In 2011, a 22-year-old conspiracy theorist named Jared Lee Loughner set out to assassinate Rep. Gabby Giffords — and ended up shooting 19 innocent people, leaving six dead.

On November 17, 2016, Brandi Worley brutally murdered both of her children and then tried to kill herself just one day after her husband filed for divorce.

On June 22, 1954, Pauline Parker and Juliet Hulme brutally bludgeoned Parker's mother to death — because they thought she would ruin their friendship.

On July 30, 2008, Tim McLean was butchered and cannibalized by Vincent Li in an unprovoked attack that remains shocking to this day.

In September 1978, Lawrence Singleton picked up a 15-year-old hitchhiker, Mary Vincent, then raped and mutilated her, before leaving her to die — and though he was sent to prison, this would not be his last crime.

In 2015, two-year-old DeOrr Kunz Jr. disappeared from a campground in Lemhi County, Idaho — and no trace of him has ever been found.

On June 21, 2020, cameras captured a bizarre series of events leading up to the disappearance of 14-year-old Noah Donohoe — including footage of the boy inexplicably riding his bike naked down a busy street in Belfast.

On September 22, 2006, Torey Adamcik and Brian Draper stabbed their friend Cassie Jo Stoddart to death and then bragged about it on camera after they were inspired by the movie Scream.