Saw this last night, and thought it might interest some in this thread -
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The Dahmer part starts at around 43 minutes in, but the really interesting part starts at 1 hour, 8 minutes. It's a longer break down of the rape Dahmer was almost caught for, and includes the long versions of the police calls, and other bits of police mishandling. One of the more shocking things was that the boy was the brother of another boy Dahmer molested years before.