Ted Bundy: Raped and murdered young women in several states during the 1970s. Executed in Florida in 1989. (AP)
Tommy Lynn Sells: Claimed responsibility for dozens of murders across the country in the 1980s and 90s. Executed in Texas in 2014 (AP)
Dennis Rader (The BTK Killer): Pleaded guilty to 10 counts of first-degree murder in 2005 to crime committed between 1974 and 1991. Serving 10 life sentences in a Kansas prison. (AP)
Aileen Wuornos: Killed seven men in Florida between 1989 and 1990. Executed in 2002. (AP)
The Zodiac Killer: Believed to be responsible for at least five murders between 1968 and 1969 around the San Francisco Bay Area. A suspect has never been apprehended. (KGO)
Gary Ridgway (The Green River Killer): Pleaded guilty to 48 counts of murder during the 1980s and 90s, although later claimed to as many as 75-80 women. Serving a life sentence. (AP)
John Wayne Gacy (The Killer Clown): Murder 33 young men between 1972 and 1978. Executed by lethal injection in 1994. (AP)
Charles Ng: Believed to have killed as many as 25 people in Northern California with his accomplice Leonard Lake. Currently on death row. (AP)
Jeffrey Dahmer (The Milwaukee Cannibal): Killed 17 men between 1978 and 1991 as well as committed acts of necrophilia and cannibalism. Murdered by a fellow prison inmate in 1994. (AP)
Richard Ramirez (The Night Stalker): Convicted in 1989 of 13 murders committed in California between 1984 and 1985. Died in 2013 awaiting execution. (AP)
Angelo Buono and Kenneth Bianchi (The Hillside Stranglers): Killed 10 girls and women in the Los Angeles hills in 1977 and 1978. Sentenced to life in prison. Buono died in 2002. (AP)
Edmund Kemper (The Co-ed Killer): Found guilty of eight murders in California in the 1970s -- six female hitchhikers, his mother and her friend. Sentenced to life in prison. (AP)
David Berkowitz (Son of Sam): Confessed to killing six people in New York City between 1976 and 1977. Sentenced to 25 years to life for each murder, remains in prison today. (AP)
Jeffrey Dahmer. John Wayne Gacy. Ted Bundy. Meet the men (and woman) behind some of the most horrific murders in U.S. history.