Convicted 1972 to 1978 Serial killer profile

John Wayne Gacy

The Killer Clown

Executed in 1994. John Wayne Gacy was convicted by a Cook County jury in 1980 of murdering 33 boys and young men in suburban Chicago between 1972 and 1978; 29 were found at his home. Five victims remain unidentified.

Also known as
The Killer Clown, Pogo the Clown
Legal status
Convicted
Active
1972 to 1978
States
Illinois
Cities
Norwood Park Township, Chicago, Des Plaines
Victims
33 convicted, 30 confessed, 33 confirmed; Cook County Sheriff Tom Dart has said he suspects Gacy also killed while travelling for work, which the trial prosecutor disputes suspected
Victim profile
Boys and young men aged 14 to 21, several of them runaways, hitchhikers or job applicants to his contracting business
Method
strangulation, asphyxiation
Apprehended
December 21, 1978
How caught
Des Plaines police investigating the disappearance of 15-year-old Robert Piest traced him to Gacy, who confessed after a search of his home turned up evidence tied to Piest.
Sentence
Death on 12 murder counts and natural life on the remaining 21 (March 1980)
Fate
Executed: Lethal injection at Stateville Correctional Center, Illinois, May 10, 1994
Born
March 17, 1942
Died
May 10, 1994
Timeline to scale
Each dot is a dated event below; the distance between dots is elapsed time. The darker dot marks the first known murder.
March 17, 1942: John Wayne Gacy born in Chicago, Illinois.1968: Convicted of sodomy in Waterloo, Iowa, and sentenced to ten years; paroled June 18, 1970.January 3, 1972: Timothy McCoy killed, the first known murder.July 31, 1975: Employee John Butkovich, 17, killed.December 11, 1978: Robert Piest, 15, disappears from a Des Plaines pharmacy after leaving to talk to Gacy about a job.December 13, 1978: Des Plaines police obtain a warrant to search Gacy's home and vehicles.December 21, 1978: Gacy arrested; he confesses early the next morning to killing about 30 people.December 26, 1978: Excavation of the crawl space begins; 29 bodies are eventually recovered from the property and four from the Des Plaines and Illinois rivers.February 6, 1980: Trial opens in Cook County on 33 murder counts.March 12, 1980: Jury convicts Gacy of all 33 murders after about two hours of deliberation.March 13, 1980: Jury returns death sentences on 12 counts; natural life imposed on the other 21.June 6, 1984: Illinois Supreme Court affirms the convictions and death sentences in People v. Gacy.April 12, 1993: Seventh Circuit affirms denial of federal habeas relief in Gacy v. Welborn.May 10, 1994: Executed by lethal injection at Stateville Correctional Center.November 2011: Cook County Sheriff identifies previously unnamed victim William Bundy, 19, after exhuming eight sets of remains.July 2017: James Byron Haakenson, 16, of Minnesota identified through family DNA.October 25, 2021: Francis Wayne Alexander identified as Victim No. 5 through genetic genealogy; five victims remain unidentified.19421972202150 years from incident to latest development
Illinois
6 serial killer profiles in Illinois. Select any state to browse its profiles.
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John Wayne Gacy was a Chicago-area building contractor who murdered boys and young men at his home in Norwood Park Township, Cook County, Illinois, between 1972 and 1978. According to the Illinois Supreme Court's 1984 opinion in People v. Gacy, a Cook County jury convicted him of 33 counts of murder, one count of deviate sexual assault and one count of indecent liberties with a child, and sentenced him to death on 12 murder counts and to natural life on the rest. Illinois executed him on May 10, 1994. The opinion recites that his confession put the number at about 30; police recovered 33 bodies. Three of the eight victims buried unidentified have been named since the Cook County Sheriff's Office reopened the identification effort in 2011, and five remain unidentified.

The first known victim, Timothy McCoy, was killed on January 3, 1972, according to the victim list in the Wikipedia article. Over the next six years Gacy brought young men to the house, many of them employees or job applicants at his remodelling company, runaways or hitchhikers. NBC Chicago, in a 40th-anniversary report, described a handcuff and rope trick used to restrain and then strangle the victims, who ranged in age from 14 to 21. Twenty-six bodies were buried in the crawl space under the house, three elsewhere on the property, and four were thrown into the Des Plaines River.

The case broke on December 11, 1978, when 15-year-old Robert Piest left the Des Plaines pharmacy where he worked to talk to a contractor about a summer job and never returned. The Illinois Supreme Court opinion records that Gacy had been at the pharmacy that evening, that his truck was seen outside, and that police learned of his Iowa conviction for assaulting a teenage boy. Investigators obtained a search warrant for his home and vehicles on December 13, kept him under surveillance, and arrested him on December 21, 1978. Early on December 22 he confessed, saying bodies were buried under the house and five had been thrown into the river. Excavation recovered 29 bodies from the property; four more were pulled from the Des Plaines and Illinois rivers.

The trial opened on February 6, 1980, before Judge Louis Garippo with a jury drawn from Rockford. The defence argued insanity; the State's experts said Gacy had a personality disorder and was legally responsible. On March 12, 1980, after under two hours of deliberation, the jury found him guilty of all 33 murders. At sentencing the jury returned death sentences for the 12 murders committed after Illinois's 1977 death penalty statute took effect, and the court imposed natural life for the other 21.

The Illinois Supreme Court affirmed the convictions and sentences on June 6, 1984, rejecting challenges to the search warrants, jury selection and the insanity verdict, and the U.S. Supreme Court denied review in 1985. The Illinois Supreme Court upheld the dismissal of a post-conviction petition on September 29, 1988, and the Seventh Circuit, in Gacy v. Welborn on April 12, 1993, affirmed the denial of federal habeas relief. After 14 years on death row at Menard, Gacy was executed by lethal injection at Stateville Correctional Center shortly after midnight on May 10, 1994.

Eight victims were buried without names. In 2011 Cook County Sheriff Tom Dart had the remains exhumed and asked families of young men who vanished in the Chicago area in the 1970s to submit DNA. William Bundy, 19, was identified in November 2011. James Byron Haakenson, a 16-year-old runaway from Minnesota, was identified through a sister's DNA in July 2017, CBS Minnesota reported. On October 25, 2021, the sheriff's office announced that Victim No. 5 was Francis Wayne Alexander, a North Carolina native killed between early 1976 and early 1977 and identified through genetic genealogy with the DNA Doe Project, according to CBS News and ABC7. Five victims remain unidentified.

Gacy was born in Chicago on March 17, 1942. In 1968 he was convicted in Waterloo, Iowa, of sodomy involving a teenage boy; paroled on June 18, 1970, he returned to the Chicago area, ran a contracting business, was active in local Democratic politics and performed at events as a clown called Pogo.

unidentified victimsgenetic genealogydeath penaltyrunawaysinsanity defense
  1. March 17, 1942
    John Wayne Gacy born in Chicago, Illinois.
  2. 1968
    Convicted of sodomy in Waterloo, Iowa, and sentenced to ten years; paroled June 18, 1970.
  3. January 3, 1972
    Timothy McCoy killed, the first known murder.
  4. July 31, 1975
    Employee John Butkovich, 17, killed.
  5. December 11, 1978
    Robert Piest, 15, disappears from a Des Plaines pharmacy after leaving to talk to Gacy about a job.
  6. December 13, 1978
    Des Plaines police obtain a warrant to search Gacy's home and vehicles.
  7. December 21, 1978
    Gacy arrested; he confesses early the next morning to killing about 30 people.
  8. December 26, 1978
    Excavation of the crawl space begins; 29 bodies are eventually recovered from the property and four from the Des Plaines and Illinois rivers.
  9. February 6, 1980
    Trial opens in Cook County on 33 murder counts.
  10. March 12, 1980
    Jury convicts Gacy of all 33 murders after about two hours of deliberation.
  11. March 13, 1980
    Jury returns death sentences on 12 counts; natural life imposed on the other 21.
  12. June 6, 1984
    Illinois Supreme Court affirms the convictions and death sentences in People v. Gacy.
  13. April 12, 1993
    Seventh Circuit affirms denial of federal habeas relief in Gacy v. Welborn.
  14. May 10, 1994
    Executed by lethal injection at Stateville Correctional Center.
  15. November 2011
    Cook County Sheriff identifies previously unnamed victim William Bundy, 19, after exhuming eight sets of remains.
  16. July 2017
    James Byron Haakenson, 16, of Minnesota identified through family DNA.
  17. October 25, 2021
    Francis Wayne Alexander identified as Victim No. 5 through genetic genealogy; five victims remain unidentified.

The victims are documented as cases in the cold case index, each with its own timeline and sources.

Corrections and family contact

This profile states only what courts, official bodies and the cited reporting have recorded. A court convicted this person of murder; the counts are stated in the sentence line.

If you are a relative of a victim named here and want a name corrected, updated or removed, or if you can show that a fact on this page is wrong, email info@coldcaseindex.com. Requests from families are acted on first.

Facts last verified October 28, 2026. Page last updated November 4, 2026.

Cite this entry

Permalink: https://coldcaseindex.com/serial-killers/john-wayne-gacy/. This entry was last updated on November 4, 2026; cite that date as the publication date. The primary sources listed above should be cited for the underlying facts.

APA
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MLA
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Wikipedia
{{cite web |url=https://coldcaseindex.com/serial-killers/john-wayne-gacy/ |title=John Wayne Gacy |website=ColdCaseIndex |date=2026-11-04 |access-date=}}