Determining whether John Wayne Gacy was left-handed involves sifting through documented evidence from his life, trials, and available biographical information. Handedness, while seemingly a minor detail, can sometimes be noted in criminal profiles or case analyses, especially if it impacted the manner in which crimes were committed. Since Gacy was a notorious serial killer, any peculiarities about his physical habits were meticulously examined. However, if no specific mention is made, we must resort to more general observations. Given that approximately 10-12% of the population is left-handed, the statistical probability leans towards him being right-handed, but without concrete data, the answer remains elusive.

John Wayne Gacy, born on March 17, 1942, was an American serial killer and sex offender. He was convicted of the murders of 33 young men and boys in Cook County, Illinois, between 1972 and 1978. Gacy maintained a facade of normalcy, working as a building contractor and even performing as 'Pogo the Clown' at children's parties. This dual life – seemingly a respectable businessman and entertainer while secretly a brutal killer – made him one of the most infamous criminals in American history. The discovery of the bodies buried in the crawl space of his home shocked the nation and led to a lengthy and highly publicized trial.

Gacy's trial was a media sensation, filled with graphic details and psychological analyses. The prosecution presented overwhelming evidence of his guilt, including the bodies found buried at his home and his own confessions. Gacy attempted to plead insanity, claiming he suffered from multiple personality disorder, but the jury rejected this defense. He was found guilty on all counts and sentenced to death. The case raised profound questions about the nature of evil, the psychology of serial killers, and the responsibility of society to protect vulnerable individuals.

John Wayne Gacy was executed by lethal injection on May 10, 1994. His legacy remains one of horror and fascination. His case continues to be studied by criminologists and psychologists seeking to understand the motivations and behaviors of serial killers. Gacy's ability to maintain a double life, deceiving friends, neighbors, and even his own family, underscores the complexities of human behavior and the potential for evil to lurk beneath a seemingly normal exterior. The Gacy case serves as a chilling reminder of the darkness that can exist within society.

Unfortunately, it is unknown if John Wayne Gacy is left-handed.