Blair Adams became convinced that someone was after him just before he fled his home in Canada in July 1996 — then he mysteriously turned up dead in a Tennessee parking lot just a few days later.

On April 18, 2016, surveillance videos captured an unidentifiable suspect walking around the Creekside Church of Christ in Midlothian — and police believe that person killed Missy Bevers.

Go inside the stunning rise and heartbreaking fall of Diff'rent Strokes actress Dana Plato, who died of a drug overdose in May 1999.

Larry Gene Bell was a divorced electrician who kidnapped and murdered at least two girls in South Carolina in 1985 — then tormented their families with taunting phone calls.

After Walter Collins vanished in 1928, police made his mother take in an impostor of the boy — then forced her into a psychiatric ward when she insisted that the child wasn't her son.

In October 1949, Jean Spangler vanished without a trace, and some believe she may have fallen prey to mobster Mickey Cohen's henchmen — or the same killer who murdered "Black Dahlia" Elizabeth Short.

In March 1999, 19-year-old Caroline Reed Robertson killed aspiring dancer Rachel Barber in Melbourne, Australia — then tried to assume her identity.

On September 2, 2010, 24-year-old Michelle O'Connell was found dead at Jeremy Banks’ home in St. Augustine, Florida. Authorities initially concluded it was a suicide, but O'Connell’s loved ones thought otherwise.

In August 1993, Eric Smith became known as the "Freckle-Faced Killer" after he tortured and murdered young Derrick Robie in the woods of Savona, New York.

Thomas Dillon shot and killed five men in rural Ohio between 1989 and 1992, but he was only caught when his friend turned him in to the FBI because he'd been acting so unhinged.