Cellebrite on Kohberger’s search for psychopath
Heather and Jared Barnhart from Cellebrite break down what they found in Bryan Kohberger’s search history – and what they didn’t – based on data recovered from his cellphone and a hard drive.
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Bryan Kohberger’s lawyers didn’t want prosecutors to describe him as a “psychopath” or in other specific terms if his case went to trial – but the criminology Ph.D. student turned mass murderer regularly searched for the phrase, according to digital forensics experts who dug into his phone and computer.
“On his PC (personal computer), psychopath was a normal word that he typed into a browser,” said Heather Barnhart, senior director of forensic research at Cellebrite. “But he could have said it was for his major or research.”
In addition to frequent searches for the phrase and related terms like “psychopaths paranoid,” he also looked up wiretapping, and spent Christmas night reading in depth about serial killers.
BRYAN KOHBERGER FLEXED LIKE ‘AMERICAN PSYCHO’ AND SPENT CHRISTMAS NIGHT READING ABOUT SERIAL KILLERS
Bryan Kohberger appears at the Ada County Courthouse for his sentencing hearing, Wednesday, July 23, 2025, in Boise, Idaho, for brutally stabbing four University of Idaho students to death nearly three years ago. (AP Photo/Kyle Green, Pool)
“He became paranoid,” Barnhart said.
Before Kohberger pleaded guilty, his lawyers had asked the court to block prosecutors from referring to the word “murder,” his “bushy eyebrows” or from using the terms “psychopath” and “sociopath” in front of jurors.
“To label Mr. Kohberger as a ‘murderer,’ the alleged weapon consistent with an empty sheath as a ‘murder weapon,’ or to assert that any of the four decedents was ‘murdered’ by Mr. Kohberger denies his right to a fair trial and the right to be presumed innocent,” his attorney, Anne Taylor, argued in court filings unsealed in March.
BRYAN KOHBERGER CALLED HIS MOM WHILE RETURNING TO IDAHO MURDER SCENE THE NEXT DAY, EXPERT REVEALS

Madison Mogen, top left, smiles on the shoulders of her best friend, Kaylee Goncalves, as they pose with Ethan Chapin, Xana Kernodle, and two other housemates in Goncalves’ final Instagram post, shared the day before the four students were stabbed to death. (@kayleegoncalves/Instagram)
Further, according to Taylor, using words like “psychopath” and “sociopath” to refer to the quadruple murderer would have amounted to “name calling” and…
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