Bryan Kohberger surprised us all and changed his plea to guilty earlier this month. And his confession, stone-faced and taciturn though it was, marked the first time we'd actually heard from him. So now there's just one person left whose story we hadn't heard... until now. Four University of Idaho undergrads - Maddie Mogen, Kaylee Goncalves, Xana Kernodle, and Ethan Chapin - were murdered, but two roommates survived. We've pored over what Dylan Mortensen told police that night; since she actually saw the masked killer, her witness statement was crucial information.