Bryan Kohberger on Jan. 3, 2023.Photo: Matt Rourke/AP/Shutterstock

Mandatory Credit: Photo by Matt Rourke/AP/Shutterstock (13694852g) Bryan Kohberger, who is accused of killing four University of Idaho students, is escorted to an extradition hearing at the Monroe County Courthouse in Stroudsburg, Pa Four Dead University of Idaho, Stroudsburg, United States - 03 Jan 2023

The man accused of killingfour University of Idaho studentslast 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 toBryan Kohbergerwas 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, Madison Mogen, Kaylee Goncalves and Xana Kernodle.

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

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. Hewaived 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.

The Idaho home where four students were killed on Nov. 13, 2022.Angela Palermo/Idaho Statesman/Tribune News Service via Getty Images

Four University of Idaho students were found dead Sunday, Nov. 13, 2022. Police are investigating the deaths as a crime

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

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.

source: people.com