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November 3, 2017

Chasing John Wayne Gacy

Winner of the Fall 2017 StMU History Media Award for

Article with the Best Introduction

It was December 12, 1978. Just as every morning, Chief Detective Joseph Kozenczak sat in his office on the first floor and went over the reports from the past 24 hours. Sipping some coffee, he started off by reading through Monday’s list of events: “a domestic argument which ended with the police restoring peace, a break-in on Phoenix Drive, a report of an abandoned vehicle, several malfunctioning alarms in businesses requiring police assistance to restore, etc.”1 It wasn’t until midway through the list of Monday’s Report when Joseph Kozenczak came across the name Robert Jerome Piest, a missing persons report filed by his mother Elizabeth Piest.2

John Wayne Gacy as “Pogo The Clown” | Courtesy of Wikimedia commons

Joseph Kozenczak had found this to be very interesting because of the narrative part of the report. As described from the report, the mother and son had a very repetitive routine. Elizabeth would pick up her son at 5:30 p.m. after his gymnastics session at Maine West High School in Des Plaines, Illinois. Then she would have his dinner and milk to eat in the car, and he’d usually eat it as Elizabeth drove to Nisson Pharmacy, where Robert worked. But Monday was a bit different. Rob ate a sandwich. Elizabeth had saved her birthday cake to be cut after picking up Rob from work. She arrived at Nisson Pharmacy at 9 p.m., and she went in to get Rob. Rob asked his mother to wait outside so he could discuss a summer job with a construction contractor. Twenty minutes passed and Elizabeth went to check the parking lot only to find that she was alone. There was no sign of Rob, or this mysterious construction contractor. Not knowing who the contractor was, Elizabeth called her son’s friends and one of the owners of the pharmacy, and found out that his name was John Wayne Gacy, Jr.3

Something about the report didn’t seem right to Detective Kozenczak. He knew Robert had no reason to leave his family, or run away from home, so where was he? He read the report one more time. While reading through the report, Detective Kozenczak found that the young boy Robert was born the same year as his own son, as well as the fact that the two boys attended the same high school (Maine West High School).

Detective Kozenczak decided to put “Ronnie” Ron Adams to investigate the Piest missing persons case. He chose Adams because he wasn’t just a good cop, but he also had passion for his job. He knew Adams was the right one for this case. Also Kozenczak knew about the fact that Adams had a family, and had hoped it would make things more personal while continuing the harsh investigation. Adams didn’t waste any time at all. He talked with the two brothers who owned the pharmacy, and found out that the contractor, John Gacy, had been in the store not once, but twice. To check Gacy’s alibi, Adams then called Gacy at 9:15 a.m. and Gacy explained that he had been present at the pharmacy, but only because of some remodeling plans, and to gather or see if there were any tools he needed. He also said, “He had not spoken, nor had any personal contact with the missing boy.” It was at this point that things started to not add up in the mind of Detective Kozenczak.4

Actual suit worn by John Wayne Gacy | Courtesy of Flickr Commons

The investigation “wasn’t getting anywhere fast” as Kozenczak put it. It was not until Detective Jim Pickell stepped out of his office, when things started to take off. The two detectives knew about Gacy’s arrest, but did not know exactly what John Wayne Gacy had been arrested for. Pickell went off in search of what Gacy had been arrested for. Pickell was known to get what he wanted, and always did what he had to in order to obtain it.

The two Detectives then read Gacy’s rap sheet, which was filled with numerous crimes, the first and most important: “20 May 1968-Waterloo, Iowa-Sodomy-10 years.” The word “sodomy” stuck into the two detectives’ heads. After going through the rap sheet, the two detectives were both convinced Gacy was deeply involved in the disappearance of Robert Piest.5 Later that day,Detectives Kozenczak, Pickell, Olsen, and Sommerschield went to Gacy’s house to interview him. Kozenczak and Pickell went inside, while Sommerschield and Olsen waited outside on the street. While inside the house, Gacy sat in his recliner, and not much happened except for the same story he gave Adams over the phone. Kozenczak had coaxed Gacy into coming down to the station, and after a few attempts, it finally worked.

Gacy called and came in around noon. He had no problem telling the same story, as well as filling out the witness report; but he did seem agitated after he refused a lie detector test. While that was going on, Kozenczak was gathering his warrant, and on his way back to get Gacy’s keys. At 5 p.m. Kozenczak rushed in to find Gacy and asked for his keys. Gacy was terrified and filled with anger. He fought and argued before he was forced to give up his keys.

As Kozenczak put it, “I put the key in the door and I felt like I was stepping into the unknown.”6 They searched the house and found a crawl space that was creepy, but nothing seriously incriminating; but they did take many things as evidence. They took clothes, papers, towels, shoes, etc. It was not until the third warrant was issued that Detective Kozenczak decided to crawl into the crawl space. That’s when everything changed in the blink of an eye.

When Detective Kozenczak crawled into the muddy crawl space, he was face to face with not one or two, but three bodies. He encountered the three bodies in the first ten minutes he had spent in the crawl space. A call was made, and as soon as the news was told to Gacy about the findings, he admitted to the murders with no hesitation. Once the crime scene was investigated and dug up, and everything was done, the Medical Examiner was called in, and over the course of a few weeks or so, twenty-four more bodies were discovered in the ground beneath Gacy’s crawl space. As reported by Detective Kozenczak, “There was plastic over their heads and most of them were partially clothed. They had been strangled and were in various stages of decomposition. There were skeletons everywhere.”7 But that wasn’t the end of finding bodies. The serial killer admitted that there was not enough room left for his last six victims. With no room left for the bodies, Gacy had turned to the river, dumping his last victim Robert Piest into the Des Plaines river. The river was near the Chicago Airport. Gacy admited to dumping the body in the winter of 1978, although they found his body in late spring of 1979. Robert’s body had froze, and was conserved in ice until it thawed out late spring.

John wayne Gacy Crawl Space | Courtesy of Google Images

Justice was finally served when Gacy was arrested and found guilty after a long and devastating trial in March 13, 1980. He received multiple sentences. “The jury quickly returned a verdict of guilty on thirty-three counts of murder, twelve carrying a death sentence, and two charges of sexual assault.” The jury did the right thing by putting a heartless monster like Gacy away. Gacy was executed by lethal injection on May 10, 1994, in the Stateville Correctional Center in Joliet, Illinois. Gacy was pronounced dead at 12:58 a.m.8

The ending somehow did not seem to lift the weight off the shoulders of Detective Joseph R. Kozenczak, as he stated “I thought that I would feel that it was all resolved then. But it wasn’t. It was just hard to live with.”9 Someone will never understand what it was like to be in the chase, but we know how hard and personal it was for Detective Joseph R. Kozenczak. After the chase was done and finally put to rest, Kozenczak retired and went on to write his own book, A Chicago Killer, which was a great insight into what the Gacy Case was like. Unfortunately Joseph R. Kozenczak passed away Wednesday May 13, 2015. He had served on the Des Plaines Police team as Chief Detective for 27 years.10 Detective Joseph R. Kozenczak’s passion, strength, and patience will live on longer than we can imagine. He brought justice to 33+ families and their relatives.

  1. Joseph R. Kozenczak and Karen M. Kozencz, The Chicago Killer: The Hunt For John Wayne Gacy (Xlibris, Corp., 2011), 23.
  2. Joseph R. Kozenczak and Karen M. Kozencz, The Chicago Killer: The Hunt For John Wayne Gacy (Xlibris, Corp., 2011), 24.
  3. Joseph R. Kozenczak and Karen M. Kozencz, The Chicago Killer: The Hunt For John Wayne Gacy (Xlibris, Corp., 2011), 25.
  4.  Joseph R. Kozenczak and Karen M. Kozencz, The Chicago Killer: The Hunt For John Wayne Gacy (Xlibris, Corp., 2011), 28.
  5. Joseph R. Kozenczak and Karen M. Kozencz, The Chicago Killer: The Hunt For John Wayne Gacy (Xlibris, Corp., 2011), 37.
  6. Joseph R. Kozenczak and Karen M. Kozencz, The Chicago Killer: The Hunt For John Wayne Gacy (Xlibris, Corp., 2011), 58.
  7. Ginnie Teo, “Sleuth Recalls Viciousness of Killer,” The Straits Times (Singapore, August 1997).
  8. Debbie Howlett and Sandra Sanchez, “John Wayne Gacy Executed/ Fatal Injection Ends Saga Of Serial Killer,” USA Today, (May 1994): 3.
  9. Ginnie Teo, “Sleuth Recalls Viciousness of Killer,” The Straits Times (Singapore, August 1997).
  10. N. Sameer Yacoub, “Detective who led John Wayne Gacy Investigation Dies,” US News Online, May 15, 2015.

Jasmine Martinez

Author Portfolio Page

Recent Comments


  • Emily Rodriguez

    This was such a sad case to reach, much like all the other serial killer articles. I do wonder about the clown suit; did he wear it while killing his victims? Or was a clown what he was posing as for a summer job? I think it was smart of the author to write this story with the feeling of the detective being the main perspective. I felt that this helped bring out even more empathy from the readers for the detectives and the families of the victims.

  • Madeline Bloom

    Being invested in serial killers my entire life, this article caught my attention so fast. Joh Wayne Gacy was a form of a killer clown. I never looked into Gacy only because I hate clowns. To read about all of the facts that were in his case were spine chilling. The fact that he hid bodies in his crawl space of his house but when he was being interrogated by the police, he was completely calm.

  • perla ramirez

    John Wayne Gacy has to be one of the most horrible serial killers in the United States. He targeted children and young men for his own personal gain. He would rape, then strangle them only to bury them under his home. His killing finally caught up to him when a very determined detective finally caught him. He was then killed by lethal injection in 1994.

  • Mohammed Hani Shaik

    Massive respect to the detectives for serving justice to all the families and victims involved in this case. I had never heard of the chicago killer and it was an informative and exciting first read. I really like your writing style as it kept me on the edge of my seat throughout the whole ordeal. Overall very well done with researching and publishing this article! congrats!

  • Ronin Heck

    There are numerous mistakes in this essay, as informative as it is. One of the most important is that the bodies were found on the SECOND search warrant (there never was a need for a third).

  • Alison Morales-Aguilar

    Of course, I had heard of John Wayne Gacy before but never had I researched into his killing spree. It was horrific and I feel horrible for the parents and siblings who had to go through this because of him. I am also grossed out that he said that he ran out of places to stash the bodies so he threw them in the river. He was a horrible and disgusting human being and I’m so glad that he was caught before he could continue hurting more people.

  • Julianna Olivarez

    This story of John Wayne Gacy was very informative because it was in the point of view of the detective and I really didn’t know who actually caught Gacy in the end so this was something new to me. I think that Gacy was a psychopath with no remorse or any type of feelings for his victims that made him more chilling and scary of a serial killer that he was. But for the detectives to make the connections that they did to uncover a serial killer that had killed 33 boys is remarkable. In the end his death sentence was well deserved for his crimes.

  • Mia Hernandez

    This was a very informative and well-articulated article. The name John Wayne Gacy is usually very known and a commonly heard/ thought of when discussing or thinking of serial killers. It is astounding to think that serial killers can lay amongst the general population without being noticed, like in the case of Gacy when he was doing kids performance parties as a clown.

  • Briana Montes

    Very well written article! I feel that John Wayne Gacy was one of the most scariest serial killers because he seemed like the perfect neighbor and person. He was someone you would trust completely around your kids and family. It is scary to think that there are people out there today and we would never suspect anything. Overall this article was very interesting and a great read.

  • Hannah Hennon

    John Wayne Gacy deserved to have been caught. He hurt too many people. I have read about him before, so this article was not as shocking, but it does not make it any less sad. Detective Joseph R. Kozenczak was a good man in solving the disappearance of Robert Jerome Piest. It lead him to finding more bodies of missing people.

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