He had the alter ego called Pogo the Clown. There are different serial killers that have gotten the attention of people and John Wayne Gacy is one of them. He was known to be a friendly man who loves kids a lot. He was very happy entertaining kids whenever he wore his clown costume.
Little did people know that he used an alter-ego whenever he would kill kids. It was when he was questioned when he broke down and confessed to the killings. According to estimates, he probably killed up to 34 or more kids. He died in the year 1994 when he was 52 years old. Some consider him as one of the worst serial killers.