John Wayne Gacy killed 33 men and boys between 1972 and 1978. Many of his victims, mostly drifters and runaways, were buried in a crawlspace beneath his suburban Chicago home. Here's a look at some other notorious convicted serial killers.
Jeffery Dahmer was sentenced to 15 consecutive life terms for the murders of 17 men and boys in the Milwaukee area between 1978 and 1991. Dahmer had sex with the corpses of his victims and kept the body parts of others, some of which he ate. Dahmer and another prison inmate were beaten to death during a work detail in November 1994.
Law enforcement officers meet in San Francisco in 1969 to compare notes on the Zodiac Killer, who is believed to have killed five people in 1968 and 1969. The killer gained notoriety by writing several letters to police boasting of the slayings. He claimed to have killed as many as 37 people and has never been caught.
Authorities said DNA recovered from the body of Mary Sullivan matches that of her suspected killer, the confessed Boston Strangler, Albert DeSalvo. After a sample was secretly collected from a relative, DeSalvo's body was exhumed in July 2013 for more DNA testing. From mid-1962 to early 1964, the Boston Strangler killed at least 13 women. DeSalvo was stabbed to death in 1973 while serving a prison sentence for rape.