In the 1970s, the number of serial killers rose like the United States had never seen before. Two of the killers active during this time were John Wayne Gacy in Chicago and Dean Corll in Houston. Gacy and Corll were much more sinister than their outward appearance. Their wicked acts resulted in the deaths of more than 60 young men and women and brought grief to countless families. Some of their victims have still not been identified to this day.