In 1982, 'Princess Doe' was found beaten beyond recognition in a New Jersey cemetery. Now, investigators have identified her as a 17-year-old named Dawn Olanick.

Determined to become a "proxy" of the fictional Slender Man, 12-year-old Morgan Geyser brutally stabbed her friend Payton Leutner in the Wisconsin woods — and nearly killed her.

Vincent van Gogh often reused his canvases to save money, and conservators suspect he painted the self-portrait on the back of a previously-completed painting.

Larry Sanders told police he killed his friend Jimmy Knighten because Knighten had threatened to "summon" Bigfoot.

Go inside the brutal murder of Gabriel Fernandez at the hands of his own mom — and the horrific abuse that preceded his death in May 2013.

Police arrested Robert John Lanoue, 70, and charged him with the 1982 murder of five-year-old Anne Pham.

Experts believe that the ring was once owned by a powerful Viking chief more than 1,000 years ago.

In 1990, Pamela Smart's 16-year-old lover Billy Flynn killed her husband Gregory Smart. And after a highly-publicized trial, Pamela was sentenced to life in prison as an accomplice.

Chief Standing Bear gave the pipe to attorney John Lee Webster after Webster defended him in a 1879 civil rights case.

Two men shot Riaan Naude and stole one of his guns, but police aren't sure of their motive.

Physicist Sally Ride made history on board the Challenger space shuttle in June 1983. Upon her death in July 2012, it was revealed she was also the first gay astronaut in space.