Four things we learned about Idaho murderer Bryan Kohberger from unsealed documents

Hours after Bryan Kohberger was sentenced on Wednesday to four consecutive life sentences for the murders of four US university students, local police released a trove of documents surrounding the case.

The new details shed more light into a closely followed case that has captivated Americans and shocked the small student town of Moscow, Idaho.

Kohberger pleaded guilty to murdering Kaylee Goncalves, Ethan Chapin, Xana Kernodle and Madison Mogen in their off-campus home on 13 November 2022. In exchange for that plea, he avoided the death penalty.

But no motive on the part of Kohberger is known. He also declined to speak during his sentencing hearing, meaning there is still a great deal of mystery around the case. In addition, a number of other documents relating to the case remain sealed.

Warning: this story contains graphic details

Goncalves and Kernodle had gruesome wounds

The unsealed documents give a renewed sense of the brutality of the murders.

Kernodle, one of the victims, was stabbed more than 50 times, they say.

Police said many of the wounds were "defensive", indicating she likely tried to protect herself from the attack. One of those wounds was a gash on her left hand between her index finger and thumb.

This suggested "an intense struggle had occurred," police added.

The investigators also said Goncalves' face was "disfigured" from her wounds.

Surviving roommate did not call 911

Two roommates in the house that on the night of the attack were not attacked by Kohberger.

One of pair, Dylan Mortensen, told police she heard a scream on the night of the murders that she believed came from Goncalves, the documents said.

Ms Mortensen said when she looked outside her room she saw a man in a black outfit leaving the house. She also said she heard someone running from one floor of the house to another.

She told police she didn't call 911 after seeing a masked person in the house because "she was intoxicated and didn't want to believe what was going on".

When Ms Mortensen told the other surviving roommate, Bethany Funke, about what she saw, Ms Funke reportedly thought it might have been a member of a university fraternity playing a joke on them.

Fellow inmates found Kohberger 'weird'

The newly released documents also reveal that former fellow prison inmates of Kohberger found him to be "weird".

One inmate said he had unusual habits, including that he washed his hands "dozens of times each day" and spent "45 minutes to an hour in the shower".

He was also said to have stayed awake most nights.

"Kohberger would be awake almost all night and would only take a nap during the day," police said, noting he would video chat with his mother "for hours each day".

Kohberger was seen with injuries after murders

Kohberger worked as a teaching assistant at a different educational institution, Washington State University, before he was arrested.

After the murders, another teaching assistant who worked at his university noticed Kohberger had some injuries, the documents said.

Around October and November 2022, Kohberger had injuries including a scratch on his face and knuckle wounds, the teaching assistant told police.

When asked about his injuries, Kohberger told his co-worker he had been in a car accident.