Pat Garrett didn't just kill Billy the Kid, he also became the leading expert on the outlaw's life.

On October 16, 1793, Marie Antoinette was beheaded — just months after her husband King Louis XVI met the same fate.

Mary Brunner immediately fell under Charles Manson's spell. She bore his son, aided in a murder, and attempted to hijack a plane in his name.

Before he was the Colonel, Harland Sanders sold insurance, tires, and gas before he stumbled into the fried chicken business and became a household name.

In the 1960s, Ann Atwater could feel the breeze through the cracks in her house's walls. Then a housing advocate recommended she attend a community organizing training — and the rest is history.

Hedy Lamarr was known in Hollywood as "the most beautiful woman in the world," and she also invented the technology that ultimately led to WiFi.

Rosemary West seemed like an unassuming British mother, but her home concealed brutal incest, beatings, and the remains of numerous young women — including her own daughter.

The bright snapshot of her suburban life belied a dark negative — Kristen Gilbert was a serial killer who preyed on the weakest victims: those she nursed.

"Feral Child" Genie Wiley was strapped to a chair by her parents and neglected for 13 years, giving researchers a rare chance to study human development.

When Judy Garland died of a drug overdose after struggling with addiction at age 47 in 1969, many were sad but few were surprised. Unfortunately, how she died was all too similar to how she lived.

Efraim Diveroli was known for his precociousness, a trait that would serve him well — and ultimately betray him — as he tried to scam the American government.