A Missing Teen Led Police Beneath a Contractor’s House

1. Disappearance of Robert Piest

On December 11, 1978, a 15-year-old high school student named Robert Piest disappeared after telling his mother he was going to talk about a construction job with a contractor who had visited the pharmacy where he worked. Piest failed to return home to celebrate his mother's birthday. His family immediately notified local police in Des Plaines, Illinois, prompting an inquiry into the contractor who had been seen speaking with the teenager at the store.

Police initiated a missing-person investigation into the contractor.

2. Focus on Contractor John Gacy

The pharmacy owner identified contractor John Wayne Gacy as the man who had discussed hiring teenagers. Investigators checked his background and found an earlier conviction involving a teenager in Iowa. They visited his house on West Summerdale Avenue and questioned him about Piest. Gacy denied involvement, while police checked his account against witnesses’ reports from the pharmacy.

Officers noted evasive behavior during their initial interview.

3. Police Surveillance and Pressure

As police maintained round-the-clock surveillance on his residence, Gacy displayed signs of severe stress, drinking heavily and visiting his lawyers to prepare a civil suit against the department. Investigators traced a photo receipt found in Gacy's home to a coworker of Piest, linking the teenager's personal items directly to the suspect. Officers also re-interviewed acquaintances who had performed labor at Gacy's property during previous summers.

Workers recalled spreading lime inside the crawl space.

4. Odor Detected in Heating Ducts

On December 19, investigators compiled evidence to secure a second search warrant for the Norwood Park Township residence. While officers distracted Gacy inside the home, another officer searched a bedroom and noticed a distinctly rancid smell resembling rotting corpses emanating from a heating duct. Previous searches had failed to detect the odor because the home's heating system had not been running at the time.

The suspicious odor reinforced suspicions of hidden remains.

5. Confession to Des Plaines Police

Following his arrest on December 21, Gacy confessed to detectives that he had lured Robert Piest to his home, strangled him, and disposed of the body in the Des Plaines River. He also admitted to killing numerous other young men and boys over the preceding years. Police accompanied Gacy to the river bridge where he indicated he had thrown several victims into the water, and he provided a rough diagram of his basement indicating burial locations.

He detailed the locations where additional victims were concealed.

6. Excavation of the Crawl Space

Law enforcement personnel began excavating the crawl space beneath Gacy's house, unearthing twenty-six bodies over the course of the following week. Three additional bodies were recovered from other locations on the residential property. Forensic specialists utilized dental records and X-rays to identify the recovered remains, which were found in advanced states of decomposition. The residential structure was subsequently demolished in April 1979.

Forensic teams labored for weeks to recover the remains.

7. The Cook County Criminal Trial

Gacy was brought to trial on February 6, 1980, in the Cook County Criminal Court Building before Judge Louis Garippo, with the jury selected from Rockford due to extensive local publicity. The prosecution argued that the defense's contention of insanity was a sham, presenting evidence of Gacy's logical planning and ability to control his actions. At the conclusion of arguments, prosecutors discarded photographic evidence into a replica of the crawl space trap door.

The defense and prosecution gave the jury different accounts.

8. Conviction and Death Sentence

On March 13, 1980, the jury deliberated for less than two hours before finding Gacy guilty of thirty-three counts of murder, along with related charges of sexual assault and taking indecent liberties with a child. At the time, the conviction covered the most homicides by a single individual in United States legal history. The jury subsequently sentenced him to death for the murders committed after the state capital punishment statute took effect.

The court imposed a sentence of death for the convictions.

9. Appeals Over Fourteen Years

Over the next fourteen years, Gacy's defense attorneys filed numerous appeals and post-conviction petitions challenging the validity of search warrants, jury instructions, and the effectiveness of previous legal counsel. The Supreme Court of Illinois and the Supreme Court of the United States repeatedly upheld the conviction and scheduled execution dates. All legal challenges seeking to overturn the sentence were ultimately denied by the courts.

Federal and state courts rejected all subsequent appeal efforts.

10. Execution by Lethal Injection

After years of appeals, Gacy was transferred to Stateville Correctional Center, where Illinois carried out the death sentence on May 10, 1994. The convictions covered thirty-three murders. Identifying the recovered victims remained a separate task from prosecuting their killer, and investigators later used DNA methods to identify additional people whose names had not been established during the original investigation.

The sentence was carried out at Stateville Correctional Center.

Sources

• Original narrative adaptation — CC BY-SA 4.0
• Wikipedia contributors — John Wayne Gacy (CC BY-SA 4.0)