Four University of Idaho students are discovered dead on Nov.13, 2022. Inside the investigation that led to an arrest in the case.

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.

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.

Newly unsealed documents in the case of Bryan Kohberger, the man convicted of murdering four University of Idaho students, reveal disturbing details about the crimes and the months leading up to them.

The newly released police documents revealed the horrifying extent of the crimes and an unnerving sighting by one of the victims' surviving roommates in the days leading up to the killings. They also indicate that at least one of the victims fought back intensely.

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.

Two days after Bryan Kohberger’s sentencing, prosecutor Bill Thompson spoke to NBC News about the fact that the victims’ families may not ever get the answers they seek.

Latah County Prosecutor Bill Thompson said he blocked Dylan Mortensen from being within Bryan Kohberger's view while she read a victim impact statement.

Bryan Kohberger faced emotional statements from victims' families in Boise courtroom, including scathing rebukes and one offer of forgiveness before receiving life sentences.

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.

University of Idaho murder victim Kaylee Goncalves’ sister Alivea Goncalves described what it was like coming face-to-face with killer Bryan Kohberger at his sentencing hearing. On Wednesday, July 23,