BRYAN Kohberger, displaying an unsettling expression in a hooded selfie, reportedly immersed himself in studying serial killers after being accused of brutally killing four University of Idaho students.

Kohberger’s cell phone history had been revealed, and it’s given a disturbing inside look at the life of the accused killer.

The 28-year-old former graduate student faces charges for the murders of close friends Kaylee Goncalves and Madison Mogen, both aged 21, along with couple Xana Kernodle and Ethan Chapin, both 20 years old, on November 13, 2022.

That night, a masked murderer broke into their college home in Moscow, Idaho, and violently stabbed the four to death with a military-grade knife.

It required approximately six weeks for investigators to connect Kohberger to the tragic incident, alleging that he left behind DNA at the crime scene and was recorded being near the residence multiple times before the murders occurred.

At the time, he was studying criminology at Washington State University, which is an 8-mile drive west of the University of Idaho.

Kohberger has maintained his innocence, and is set to defend himself in trial while heartbroken families of the victims desperately call for justice.

In the weeks leading up to the tragedy, Kohberger was beginning to struggle with his coursework and teaching students, those who worked with him told Dateline.

An inside look at his cell phone appears to show he was becoming secretly obsessed with young women at the surrounding universities, as he collected a cache of Instagram screenshots of girls.