Investigators Get Tips After 40th Anniversary of John Wayne Gacy Arrest

Read NBC 5 Investigates' coverage: "40 Years Later: Secrets of the John Wayne Gacy Case"

News coverage of last month's 40th anniversary of serial killer John Wayne Gacy's arrest has meant dozens of more tips for Illinois investigators trying to identify victims.

While 33 bodies were found, there have long been questions about whether John Gacy had other victims. For instance, Cook County Sheriff Tom Dart speculates Gacy might have killed elsewhere during his extensive travels. Bill Kunkle discusses the evidence showed at trial.

The Cook County sheriff's lead investigator said that about 10 of the 25 tips he's received are worth pursuing.

Gacy was convicted of killing 33 young men and executed in 1994, but Cook County Sheriff Tom Dart reopened the case in 2011.

The reopened investigation has so far resulted in two bodies being identified. Six others remain nameless.

John Wayne Gacy had two lethal “tricks” he would perform on his victims: a handcuff trick and a rope trick. Detective Mike Albrecht was questioning Gacy shortly after his arrest when he offered to demonstrate. Here is Albrecht’s account of that frightening moment.

The most recent identification was 16-year-old Jimmy Haakenson, whose body was among dozens found in a crawl space of Gacy's Chicago-area home in 1978.

The teen was identified in 2017 after his family submitted DNA for testing and Dart's office received a match.