TV-14
These are serial killers who work as a team; monsters who feed off each other's warped psyches.
An analysis contrasts the psyches of the Toy Box Killer and the BTK Strangler.
A look at a killer labeled America's most meticulous serial killer, Israel Keyes.
Serial killer and physician Dr. Harold Shipman murders more than 200 victims.
Examining the most excessive serial killers who murder and cross over into horrible perversions.
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