Xana Kernodle is very likely the reason Bryan Kohberger left behind his knife sheath and why there was an eyewitness to the crime.Bryan Kohberger attempted to commit the perfect crime when he murdered four University of Idaho students inside their off-campus home.

Newly unsealed documents reveal unsettling details about what Bryan Kohberger did to his victims, along with the roommates' suspicions that someone was stalking them.

Bryan Kohberger was sentenced Wednesday after a plea deal following his confession to the Idaho student murders of Kaylee Goncalves, Madison Mogen, Xana Kernodle, and Ethan Chapin, avoiding the death penalty.