"Happy Face Killer" Keith Jesperson believes Kohberger's awkwardness and high-profile murder case make him vulnerable, and he's recommending a transfer to Oregon.

In the days after murdering four University of Idaho students in an off-campus home, Bryan Kohberger’s behavior shifted dramatically and investigators would later find that he had fixated on news coverage of the killings and began paying for items in cash – often wearing gloves – as he avoided the area of the murders.

ABC News sat down with Idaho State Police Lt. Darren Gilbertson, the lead detective in the Idaho murders case, after Bryan Kohberger was put behind bars for life.

Idaho quadruple murderer Bryan Kohberger transitions from county jail to maximum security prison, where inmates with life sentences have nothing to lose.

Bryan Kohberger won't be totally cut off from the world on the inside ... and, he can even send messages to young women across the country -- though not via any dating apps.

Kaylee Goncalves’ father, Steve, spoke with CNN’s Jim Sciutto after Bryan Kohberger was sentenced to life in prison without parole for the murders of four University of Idaho students, including his daughter.

The woman told police that they planned to meet shortly after he stabbed four students, but that they stopped talking because their conversations made her "uncomfortable."

Families of the University of Idaho murder victims spoke directly to their children's admitted killer Bryan Kohberger at his sentencing hearing.