Photos recovered from the phone of Bryan Kohberger, the man convicted in the 2022 slayings of four University of Idaho students, show him posing bare-chested and making a range of facial expressions inside an apartment authorities say was linked to his time at Washington State University.

The images were recovered after Kohberger's Dec. 30, 2022, arrest at his parents' home in Albrightsville, Pennsylvania, and were examined by digital forensics specialists as part of the investigation. The photos, which were first published by NewsNation, were described by forensics experts as unusual and not shared with others on his contacts list.

The photos depict a man identified by investigators as Kohberger standing in front of a closet filled with blue shirts, wearing cordless headphones in one shot and appearing bare-chested in several others. In one image he salutes the camera and a cut is visible on a knuckle. In other images he is seen baring a row of yellowed teeth in a grin, pursing his lips, squinting and flexing while facing the camera.

Jared and Heather Barnhart of digital forensics firm Cellebrite described the images in interviews with media outlets. Heather Barnhart, the company's senior director of forensics research, said the photos resembled narcissistic self-portraits and compared them to depictions of vanity in popular culture. Her husband, Jared Barnhart, said the images appeared not to have been shared with others.

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Investigators used the phone imagery and other recovered digital data to review search activity, contacts and timelines as part of their evidence-gathering. Prosecutors charged Kohberger with four counts of first-degree murder and one count of felony burglary in the Nov. 2022 killings of Xana Kernodle, 20; Ethan Chapin, 20; Kaylee Goncalves, 21; and Madison Mogen, 21. He pleaded guilty last month as part of a deal that required him to waive his right to appeal and to seek a sentence reduction.

Kohberger, 30 at the time of his arrest, had attended Washington State University for one semester before his arrest. Court filings and statements from law enforcement said the images were among hundreds of files reviewed by forensic analysts after authorities obtained the phone. The Barnharts said the photos included shots taken from unusual angles, including behind and in profile.

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Kohberger is serving four consecutive life sentences plus an additional 10 years. The plea agreement ended the need for a trial and closed a high-profile investigation that drew national attention. Law enforcement officials and prosecutors have said digital evidence, including data extracted from electronic devices, played a significant role in reconstructing movements and contacts related to the case.

The release of the photographs in media reports renewed public interest in the case and prompted commentary from observers on the role of digital forensics in modern criminal investigations. Authorities have maintained that investigative and evidentiary materials were handled according to legal procedures during the probe and subsequent prosecution.