When Moscow, Idaho, detectives entered the horrifying crime scene where four university students were found mysteriously stabbed to death on Nov. 13 – they discovered a major clue – a Ka-Bar knife sheath — lying on the bed next to one of the bodies. But the DNA they found on that sheath led them nowhere – at first.

Dylan Mortensen made an emotional statement July 23 at the sentencing of Bryan Kohberger, who killed her University of Idaho peers Madison Mogen, Kaylee Goncalves, Ethan Chapin and Xana Kernodle.