John Wayne Gacy, Jr. (March 17, 1942 May 10, 1994) was an American serial killer. Between 1972 and 1978, the year he was arrested, Gacy raped and murdered at least 33 young men and boys. Although some of his victims’ bodies were found in the Des Plaines River, he buried 26 of them in the small crawl space underneath the basement of his home and three more elsewhere on his property. He became known as Killer Clown because of the popular block parties he would throw for his friends and neighbors, entertaining children in a clown suit and makeup as Pogo the Clown.
On May 10, 1994, Gacy was executed at Stateville Correctional Center in Crest Hill, Illinois, by lethal injection. After his execution, Gacy’s brain was removed for examination by the forensic psychiatrist hired by his lawyers; it revealed no abnormalities.