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Bryan Kohberger, the convicted murderer of four University of Idaho students in a 2022 off-campus home invasion, is currently claiming from his prison cell that he’s being verbally harassed and physically threatened by fellow inmates. The 30-year-old former criminology Ph.D. student is serving a life sentence without parole at the Idaho Maximum Security Institution (IMSI), and wants to be moved to another wing of the prison from his current living quarters.

Documents obtained by PEOPLE reveal that Kohberger has been subjected to “minute-by-minute” verbal threats from other inmates since he first arrived in J Block, a unit that houses inmates who present the highest security risk to the institution or who are high-profile inmates, including those on death row. In at least two separate grievances Kohberger has written, he has alleged graphic threats being directed at him, including inmates telling him “I’ll b— f— you” and “The only a– we’ll be eating is Kohberger’s.”

The threats, Kohberger alleged in his grievances, have been ongoing since two days after he first entered J Block. He then filed a handwritten letter to officials seven days after that, saying he wanted to be transferred to a quieter, safer wing in B Block “immediately” and asking to be moved as soon as possible. “Tier 2 of J Block is an environment that I wish to transfer from if possible,” Kohberger wrote in the letter. “I request transfer to B Block immediately. I wish to speak with you soon.”

Kohberger also stated in the letter that he has not committed any disciplinary offenses common to a prison setting like “flooding” or “striking.” Flooding is usually defined as when an inmate clogs toilets or sinks with things like food or soap to cause damage and mold, while striking typically means not working or fighting. Kohberger was clear that he has not been partaking in any of that behavior, and feels that he is being targeted unjustly in his current housing. Guards who were on duty at the time confirmed that they heard the vulgar language coming from the inmates at Kohberger’s direction, but one of the guards admitted that he could not remember exactly what was said.

To date, state prison officials have not indicated that they will be moving Kohberger. As of this week, he is still listed as being in J Block in the state prison’s system. The Idaho Department of Correction also declined to comment to PEOPLE about Kohberger’s complaints.

Kohberger’s complaints of harassment from other inmates in the prison population were not only limited to state prison. In county jail, Kohberger was mocked by inmates multiple times, including on a video call with his mother in which another inmate screamed insults at Kohberger. One jail inmate referred to him as a “f—ing weirdo” and later said that he would have killed Kohberger had it not been for fear of punishment or consequences.

In court filings during the trial, Kohberger was described as socially awkward, with a “piercing stare” and a “distinct lack of social perceptiveness.” As a result, one prison consultant, who spoke with PEOPLE but asked to remain anonymous, said the qualities along with Kohberger’s infamy will make him a target in prison. “High-profile offenders nearly always draw hostility,” the consultant said. “For Kohberger, his personality and notoriety put an even bigger target on his back.”

In the two and a half years since his arrest and trial, Kohberger’s appearance has noticeably changed. Sources told PEOPLE that Kohberger has lost a significant amount of weight since his arrest. Kohberger is housed in Idaho’s most secure prison, which is home to some of Idaho’s most notorious offenders, including death row inmate Chad Daybell. Kohberger’s time in that prison has been anything but kind, and according to prison consultant George Stone, Kohberger’s experience may resemble that of Jeffrey Dahmer. Stone, who has written extensively about prison safety and was formerly the Deputy Assistant Director of the Federal Bureau of Prisons, told PEOPLE, “The same kinds of abuse Dahmer suffered — years of threats, brutal beatings and taunts that culminated in his death at the hands of another inmate in 1994 — could well be in store for Kohberger.”

Kohberger is in custody in J Block under close supervision for the time being. Whether or not the state will move him remains to be seen, but his notes in any capacity open a window into the kinds of threats high-profile inmates face behind bars. Kohberger is a marked man behind bars, with his notoriety for one of the most infamous crimes in the Pacific Northwest, his awkward behavior that offends many, and the brutality of the crime that he committed and directed at his victims have all combined to make him a marked man behind bars.

Life behind bars in Idaho’s Maximum Security Institution is as hostile as the courtroom where Kohberger’s life will be spent for the rest of his life, and the threats that he faces from behind bars will not be the ones that go away any time soon.