The "Killer Clown" likely contributed to people's fears of makeup-wearing jesters. But the truth is, John Wayne Gacy's personas, "Pogo" or "Patches," didn't harm a soul. It was the successful suburban businessman hiding in plain sight who was preying on young men and boys. This is the second episode in our 5-year anniversary special, looking back on the serial killer boom of the 1970s.

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