After uncovering evidence that law enforcement had not been doing everything in their power to solve the LISK case, Alexis and Billy go back to the start of investigation and the gruesome discovery of 11 victims between December 2010 and December 2011. To follow our investigation even further, stream the special "Unraveled: The Long Island Serial Killer" exclusively on discovery+. Go to discoveryplus.com/UNRAVELED to start your 7-day free trial today.*
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