In this episode of The Treehouse in the Woods, we trace Duncan McKenzie’s violent path across the Northwest, beginning with the Oct. 26, 1973 murder of 15-year-old Deborah (Debra) Prety in Coeur d’Alene, Idaho, and leading to the Jan. 21, 1974 murder of Lana Harding in Conrad, Montana. We center Deborah’s story, then follow the investigation, McKenzie’s conviction for Harding’s murder, and his 1995 execution. Decades later, DNA evidence linked McKenzie to Deborah’s killing, finally giving her family answers. We also touch on the unsettling vibes of the 1970s Inland Northwest, the rumors, occult whispers, and small-town fear that framed these cases.