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

Bryan Kohberger lost over 100 pounds to escape bullying, and then became a killer. Research reveals the dangerous psychology that can turn some victims into predators.

His arrogance (people who lack natural pride often overcompensate and become haughty) led him to grossly underestimate the motivation and tools of law enforcement. He dropped the ball several times. His murders were horrific—that ‘worked out.’ But ‘perfect’—no way.

Following Bryan Kohberger's life sentence, Moscow police released documents showing the brutality of his crimes, spying on police and accounts of strange, aggressive and bizarre behavior.

Bryan Kohberger confessed to the murders of Kaylee Goncalves, 21; Madison Mogen, 21; Xana Kernodle, 20; and Ethan Chapin, 20 in court on Wednesday

In Kohberger's case, his deal spared him the possibility of a death penalty sentence. He was charged in the murders of Madison Mogen, 21; Kaylee Goncalves, 21; Xana Kernodle, 20; and Ethan Chapin, 20.

A Pennsylvania jail guard and another man called as witnesses for Bryan Kohberger's trial in the Idaho student murders case, joining five others who may testify in August.

Bryan Kohberger confessed to the murders of four University of Idaho students in a plea deal, but Latah County Prosecutor Bill Thompson said there is still no evidence linking him to his victims