The disappearance of a teenage boy in Chicago sends investigators to the home of contractor John Wayne Gacy; a team of officers track his every move until a chance encounter…

An examination of Gacy’s past reveals unsettling evidence that authorities knew he was a sexual predator; still, Gacy was able to evade law enforcement for more than a decade as…

Gacy details his murders in a chilling confession as police uncover the scope of his crimes.

The jury must decide between sending Gacy to a psychiatric facility or condemning him to a death sentence.