Elisa Lam was a 21-year-old tourist whose 2013 disappearance and death at the Cecil Hotel received widespread attention. Her death was ruled accidental, but there are still unanswered questions about what happened to her.

Serial killer Keith Hunter Jesperson, also known as the "Happy Face Killer," brutally murdered eight women between 1990 and 1995.

Elizabeth Carmichael promised to revolutionize the automotive industry with a fuel-efficient car called the Dale, but the vehicle was never manufactured. While facing fraud charges, she was publicly revealed to be a transgender woman.

Peter Sutcliffe was a British serial killer known as the Yorkshire Ripper whose 1975-80 murder spree left residents of northern England living in fear.

In 1971, D.B. Cooper hijacked a flight for a $200,000 ransom, then disappeared after parachuting from the plane. The case remains the only unsolved commercial airline hijacking.

Larry Nassar, a former athletic trainer and doctor, sexually assaulted hundreds of women and girls, many from the world of gymnastics.

The Golden State Killer was a serial rapist turned serial killer who terrorized Californians in the 1970s and '80s. The killer was at large for decades until DNA evidence led to the arrest of a suspect Joseph DeAngelo in 2018.

After Betty Broderick murdered her ex-husband and his new wife on November 5, 1989, many debated whether she'd been pushed beyond the limits of her mental endurance or driven by vengeance.

Rodney Alcala is an American serial killer whose good looks and high IQ helped him lure victims. His 1978 appearance on the television show 'The Dating Game' resulted in his nickname of "The Dating Game Killer."

Hungarian countess Elizabeth Bathory is thought to have murdered hundreds of young women in the early 17th century.

American serial killer Israel Keyes is thought to have murdered at least 11 people before his 2012 arrest.

Samuel Little is a convicted serial killer who claims to have strangled and killed 93 people between 1970 and 2005. Little is described by the FBI as "the most prolific serial killer in U.S. history."

Jeffrey Epstein was an American money manager and registered sex offender. In August 2019, he died in jail, which was ruled a suicide.

Bumpy Johnson was one of Harlem's most notorious crime bosses of the 20th century.

Frank 'The Irishman' Sheeran was an Irish-American labor union official who helped facilitate organized crime activity into labor unions and claimed to have killed Teamster president Jimmy Hoffa.

Adnan Syed is a Muslim-American man who was convicted of murdering his ex-girlfriend Hae Min Lee in 1999. His case became internationally famous by the podcast "Serial" in 2014.

Chris Watts is a Colorado man who murdered his pregnant wife and two young daughters in August 2018.

Bernie Madoff is a former stockbroker who ran his multibillion-dollar firm as a grand-scale Ponzi scheme. He is currently serving a 150-year prison sentence.

Erik Menendez and his older brother, Lyle, were sentenced to double life terms in prison for the 1989 murder of their parents.

Erik and Lyle Menendez have been reunited in a Southern California prison. The brothers -- who are serving life sentences without parole for killing their parents in their Beverly Hills mansion in 1989 -- moved into the same housing unit and will participate in rehabilitation programs.

Charles Manson was an American cult leader whose followers carried out several notorious murders in the late 1960s, resulting in his life imprisonment. He died in 2017 after spending more than four decades in prison.

Former American football star O.J. Simpson was acquitted for the murders of his ex-wife and her friend following a high-profile 1995 criminal trial, dubbed the "Trial of the Century."

Warren Jeffs, the leader of the polygamist sect Fundamentalist Church of Jesus Christ of Latter-Day Saints, was convicted in 2011 for the sexual assault of underage girls.