Body language experts analyze Bryan Kohberger's cold demeanor during his Idaho murder sentencing, revealing moments when his emotionless facade cracked during victim impact statements.

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

The convicted murderer appears gaunt and expressionless in the photo, taken as he begins to serve out multiple life sentences for the murders of four University of Idaho students: Xana Kernodle, 20; Ethan Chapin, 20; Madison Mogen, 21; and Kaylee Goncalves, 21.

"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.

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

Xana Kernodle is very likely the reason Bryan Kohberger left behind his knife sheath and why there was an eyewitness to the crime.

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

One victim’s aunt urged the killer to call her and answer her questions. Another’s sister demanded to know her sibling’s last words.