A serial killer makes his mistake by killing his 4th (or maybe 5th?) victim in Grand Canyon National Park.  Ranger Nick was on scene and is here to give us some details from the Ranger's view.

Sources links:

 Robert Spangler - Wikipedia

https://murderpedia.org/male.S/s/spangler-robert.htm

The Plea — Robert Spangler, a unique black widower killed his wives the Crime Library — Crime Library 


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