When he realizes that his demands are not going to be met, incarcerated serial killer Israel Keyes pulls off one final power play. To identify other victims Keyes murdered, frustrated investigators must try and piece together remaining clues. Do his paintings of skulls mean anything, or is he having the last laugh? The investigation into his secret crimes continues to this day. 

Speaking with journalists and detectives, Dr. Michelle Ward looks into potential victims of The Cross-Country Killer – and explores new information discovered in 2024. 

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S8 Ep.6: 11 Skulls