With Bryan Kohberger sentenced to life in prison for the murders of four Idaho college students, investigators have been sharing haunting details about the crime scene.

"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.

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

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.

Despite Kohberger's guilty plea in the Idaho murders, investigators still don't know his motive, who he targeted or where the murder weapon is after he covered his tracks.

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.

As Bryan Kohberger prepares to serve four consecutive life sentences in an Idaho state prison for the murder of four college students, we reflect on the events that led to his guilty plea.

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

After eight years as chief and nearly 29 years overall with the city police department, Fry retired from his post in May 2024. His decision came about a year and a half after the arrest of Bryan Kohberger, who stabbed the four college students to death for reasons detectives said they still don’t know.

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."