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Bryan Kohberger, the man convicted of killing four University of Idaho students, is back in the news—but this time from inside a prison cell. According to numerous handwritten grievances obtained by PEOPLE, Kohberger is claiming he is being harassed daily by inmates housed at the Idaho Maximum Security Institution, the state’s supermax prison.

In one filing, Kohberger reportedly requested to be moved from the prison’s J Block, which contains some of the most high-profile and high-risk inmates, including the state’s death row, to a quieter B Block. Kohberger wrote that he was being subjected to “minute-by-minute” verbal harassment and that inmates had been “graphic with threats of sexual assault.”

The 30-year-old former Ph.D. student, who had been transferred to the J Block after initially being housed in administrative segregation (or ad-seg), a type of protective custody where inmates are isolated to keep them safe, alleged in the letter that the abuse started just two days after he was placed in J Block. Less than one week later, he filed another grievance, claiming after he was told by one inmate, “I’ll b— f— you,” and by another, “The only a– we’ll be eating is Kohberger’s.” Guards wrote in the report that they did hear vulgar language directed at Kohberger but did not remember the exact words used.

“As I continue the SPI phase, I wish to discuss if I may be transferred to another ad-seg setting,” Kohberger wrote in the Sept. 22 letter, using prison slang for “administrative segregation.” “Tier 2 of J Block is an environment that I wish to transfer from if possible. I request transfer to B Block immediately. I wish to speak with you soon.” Kohberger also insisted in the letter that he had not been flooding or “striking,” terms often used to describe inmate protests. Flooding often refers to clogging sinks or toilets to cause water damage. “Striking” can mean refusing to work, violence, or other misconduct. State prison officials have not confirmed whether they intend to move him. Records show that he remained in J Block as of Wednesday.

Target Behind Bars

Kohberger’s life in prison has not been easy. Records from his earlier time in jail show that inmates often mocked him, including while he was on video calls with his mother. At one point, a prisoner loudly told Kohberger a “f—ing weirdo” and later claimed he would have “hit him” but “didn’t want to pay the repercussions.”

Some prison experts believe his demeanor, which was described in court documents as a “piercing stare” and general lack of awareness of social cues, has made him a target in the already intense atmosphere of a prison. When combined with the high-profile nature of his crimes, they say, Kohberger was practically guaranteed to be picked on. “High-profile offenders nearly always have a target on their back,” one prison consultant previously told PEOPLE. “In Kohberger’s case, his personality makes him stand out even more.”

Life in prison has visibly changed Kohberger, some say. He has lost weight during his two and a half years in custody, which has included time in isolation. In Idaho’s most secure facility, Kohberger is kept among the state’s most dangerous offenders, including death row inmate Chad Daybell.

Kohberger’s grievances have already drawn comparisons to other high-profile inmates who suffered for years from inmate harassment before they were killed. Jeffrey Dahmer, for example, endured years of abuse before he was killed in prison in 1994. Some prison experts believe Kohberger could have a similar fate if prison authorities do not listen to his concerns.

In the meantime, Kohberger is expected to remain in J Block for the rest of his life without the possibility of parole. Prison officials have declined to comment on his current security status, saying that he would not be safe if they provided details. But Kohberger’s letters suggest a man who has not only been living with the infamy of his heinous crimes but with an active mob against him as well.

Kohberger’s request for a transfer has not been granted, but it’s unlikely that it will be, at least in the short term. What seems clear is that Kohberger’s notoriety as the Grizzly Man, and a reputation for being a bit of a weirdo, have followed him into prison — and are likely to keep him as a target for as long as he remains behind bars.