Raised in Brooklyn alongside his brother Al, Frank Capone followed mobster Johnny Torrio to Chicago in the 1920s and helped build the city's crime family.

After losing control of the experimental aircraft he was piloting, John Denver died when his plane crashed into Monterey Bay on October 12, 1997.

Tex Watson was just a young man from Texas in 1969 when he came under the spell of drugs and Charles Manson — and helped kill seven people.

Zachary Davis had a history of mental disturbance, but no one could have predicted that the Tennessee teen would beat his mother to death one night in August 2012.

King Charles II of Spain suffered from numerous physical and cognitive disabilities due to generations of inbreeding, and since his genetics seemingly rendered him infertile as well, the Spanish Habsburg dynasty came to an end when he died in 1700.

A torture device commonly used to elicit prisoner confessions in early modern Europe, the thumbscrew was designed to crush victims’ fingers or toes, leaving them in incredible pain — but alive.

Despite having no legal experience, Roy Bean was appointed a justice of the peace in Pecos County, Texas to help establish law and order there in the 19th century — and he did so in the most Wild West way imaginable.

Between 1979 and 1981, at least 28 children and young adults were murdered across Atlanta. Was Wayne Williams their killer?

Aum Shinrikyo was founded in 1980s Japan as a yoga and meditation group, but before long, leader Shoko Asahara pushed the group toward chemical weapons manufacturing and terrorist attacks.

Dubbed "Joel the Ripper," Joel Rifkin terrorized prostitutes in the early 1990s — and became the most prolific serial killer in New York history.

John "Junior" Gotti joined the Mafia in 1988, became the youngest capo in Gambino family history by the time he was 26, took over as acting boss in 1991 — and then walked away from it all.