In the remote mountains of north-west Washington, Israel Keyes splits his time between taking care of his young family and hunting for victims. When he travels to visit family members in other states, The Cross-Country Killer discovers fresh hunting grounds and develops new methods of killing in secret. Increasingly emboldened, his murder spree culminates in a horrendous attack on a suburban couple. 

Speaking with witnesses and detectives, Dr. Michelle Ward investigates how Keyes perfects his MO – and then deviates from it in search of sustaining the adrenaline high. 

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S8 Ep.3: Hunting Grounds