Medgar Evers was a civil rights activist who organized voter-registration efforts, demonstrations and boycotts of companies that practiced discrimination.

After Duane "Keffe D" Davis, the uncle of the prime suspect in Tupac Shakur's murder, confessed to TV that a person in his car fired the shots that killed Tupac. A change.org petition is demanding Los Vegas police considerer new arrest warrants in the rapper’s 1996 murder.

‘Biggie: The Life of Notorious B.I.G.’ is the first biography to be authorized by his estate and is the most personal and revealing documentary about the late Christopher Wallace that anyone has ever seen. Watch the full-length ‘Biography Presents’ documentary online at A&E.

Billy the Kid is best known for his time as a thief and gunfighter, constantly on the run from law enforcement.

Today's Google Doodle celebrates Selena Quintanilla, known as the "Queen of Tejano Music," who released her debut album on October 17, 1989. The beloved Latin recording artist was killed by the president of her fan club in 1995 at the age of 23.

Infamous drug trafficker Griselda Blanco is suspected of committing more than 200 murders while transporting cocaine from Colombia to the U.S. She was murdered in Colombia in 2012.

Sitting Bull was a Teton Dakota Indian chief under whom the Sioux tribes united in their struggle for survival on the North American Great Plains.

Rasputin is best known for his role as a mystical adviser in the court of Czar Nicholas II of Russia.

Canadian-American actor Phil Hartman is best known for his performances on Saturday Night Live.

Lee Harvey Oswald was a former U.S. Marine who was accused of killing President John F. Kennedy. While in police custody, Oswald was murdered by Jack Ruby.

Playwright, poet. Christopher Marlowe was a poet and playwright at the forefront of the 16th-century dramatic renaissance. His works influenced William Shakespeare and generations of writers to follow.

Gangster Dutch Schultz built up a criminal network that included bootlegging, illegal gambling and murder. His biggest enemies were Legs Diamond and the IRS.

Jesse James was a bank and train robber in the American Old West, best known as the leading member of the James-Younger gang of outlaws.

Dorothy Stratten was a Playboy model and actress before she was murdered at the age of 20.

Ma Barker was the matriarch of the Barker-Karpis Gang, whose spree of kidnappings, murderers and bank robberies led to her and its members' violent deaths.

Model and actress Sharon Tate is best remembered for her tragic and untimely death at the hands of followers of murderous cult leader Charles Manson.

The assassination of designer Gianni Versace is the subject of season two of ‘American Crime Story,’ following season one on OJ Simpson. The FX TV show stretches back from Andrew Cunnan’s murder of Versaci to the men’s childhoods, suggesting homophobia hampered the investigation.

Jezebel was a Phoenician princess, later the wife of King Ahab of Israel. In the centuries since her death, she has acquired numerous references in popular culture, none of them flattering.

Gaius Caesar, known as Caligula, succeeded Tiberius and served as Roman emperor from 37 to 41 A.D.

While searching for the mythical fountain of youth, Juan Ponce de León founded the oldest settlement in Puerto Rico and landed on the mainland of North America, a region he dubbed “Florida.”

Famed singer-songwriter John Lennon founded the Beatles, a band that impacted the popular music scene like no other.

Addie Mae Collins was a 14-year-old murder victim whose 1963 death focused public attention on racial violence in the South.

New York City resident Etan Patz disappeared in 1979, when he was 6 years old. Nearly 33 years later, in May 2012, New Jersey resident Pedro Hernandez confessed to the murder.

Legendary hip-hop DJ Jam Master Jay was a member of the groundbreaking rap group Run-D.M.C.