In the true story that inspired Pain & Gain, Daniel Lugo and the Sun Gym gang botched multiple kidnapping plots, accidentally killed several of their extortion targets, and brutally disfigured their victims' corpses in a failed attempt to cover up their crimes.

In 1993, Virginia couple John and Lorena Bobbitt became infamous for their "malicious wounding" incident, which Lorena claimed was sparked by years of abuse.

After years of being bullied, 17-year-old Christine Paolilla became friends with two popular girls who helped her fit in at her Texas high school — and then she shot them to death.

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.