Bryan Kohberger Allegedly Had Pictures a Victim on His Phone: Source

The man accused of killing four University of Idaho students last November allegedly had pictures of one of the female victims on his phone, a source familiar with the investigation tells PEOPLE.

A phone that belonged to Bryan Kohberger was collected after his arrest. According to the source, authorities found pictures of the victim on the device. The source did not specify whether they were photos that he had taken of her or if they were downloaded from her social media.

"He had more than one picture of her," the source says. "It was clear that he was paying attention to her."

Ethan Chapin, Xana Kernodle, Madison Mogen, and Kaylee Goncalves — Ethan Chapin, Madison Mogen, Kaylee Goncalves and Xana Kernodle.

Madison Mogen, 21, Kaylee Goncalves, 21, Xana Kernodle, 20, and Ethan Chapin, 20, were all stabbed to death in an off-campus rental home in Moscow, Idaho, on Nov. 13. A masked intruder entered the home and killed the four students with a fixed-blade knife.

More than a month later, authorities arrested Kohberger, a 28-year-old graduate student and teaching assistant at Washington State University. He was charged with four counts of murder and one count of felony burglary.

Kohberger was arrested at his parents' Pennsylvania home on December 30. He waived his extradition to Idaho, meaning he voluntarily agreed to return to the state to face the charges against him. He was transported back to Idaho on Jan. 4.

Four University of Idaho students were found dead Sunday, Nov. 13, 2022. Police are investigating the deaths as a crime — The Idaho home where four students were killed on Nov. 13, 2022. Angela Palermo/Idaho Statesman/Tribune News Service via Getty Images

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According to the probable cause affidavit obtained by PEOPLE, one of the victims' surviving roommates said she saw the killer. The roommate described "a figure clad in black clothing and a mask," who walked past her as the person left the crime scene.

The affidavit also alleged that Kohberger was linked to the crime scene from DNA and cell phone pings.

Authorities remain tight-lipped about the alleged motive in the attack — and a judge has imposed a gag order to keep many of the details from becoming public.

Kohberger has not yet entered a plea. His next hearing isn't until June 26. His attorney has not returned PEOPLE's messages for comment.