Former UFC champion and Hall of Famer BJ Penn is once again at the center of legal and personal turmoil as Hawaii County prosecutors have formally requested a court-ordered mental health evaluation for the 46-year-old fighter. The request comes after a series of disturbing events, including allegations that Penn assaulted his 79-year-old mother over Memorial Day weekend and claimed on social media that she and other family members had been replaced by imposters.
However, the court must wait until Penn is appointed a public defender before moving forward with the mental health exam. His next hearing is scheduled for Friday, at which time the prosecution may renew its request.
The charges stem from two arrests over the course of one weekend in Hilo. According to court records, the first incident occurred when Penn allegedly took his mother’s mail and shined a flashlight in her eyes. When she tried to intervene, he reportedly shoved her against a vehicle. He was arrested and released on $2,000 bail with an order to avoid contact with the alleged victim. But only hours later, Penn was arrested again for violating that order by returning to her residence.
The situation quickly spiraled into unsettling narrative when Penn posted on Instagram that the woman is not his real mother, but an “imposter” who “has tried to get me to assault her” and allegedly “walked around my house with a gun.” Penn has claimed multiple family members have been replaced by actors or killed—classic symptoms of Capgras syndrome, a rare delusional misidentification disorder.
His mother, Lorraine Shin, has since filed for a restraining order, pleading with the court to intervene before her son’s mental state worsens. In her declaration, she wrote:
“I believe my son is suffering from Capgras delusional syndrome. He believes I’m an imposter who has killed his family to gain control of the family assets.”
She has asked the court to mandate treatment for Penn and grant a six-month protective order.
Penn, for his part, has remained defiant, dismissing the allegations and accusations of mental instability as retaliation for his public comments. In a now-deleted Instagram post, he wrote:
“I NEED TO GO TO THE HOSPITAL FOR POSTING ON INSTAGRAM? WHAT DID I PHYSICALLY DO?”
In a follow-up comment, he added:
“Imagine having to go to a mental hospital for a tweet or an Instagram post that you put up 🤔 to find out who the rulers are all you have to do is see who tries to incarcerate or asylum you after telling the truth #hawaii”
The post garnered concern and criticism alike. One user responded, “We all want to see you well, man,” while another pointed out, “How can you post that your family has been abducted or killed and replaced with actors and then get upset when people worry about your mental health?”
This is not the first time Penn has expressed fringe beliefs online. In a resurfaced video, he argued that asbestos was harmless and called CTE “as fake as the coronavirus.” More recently, Penn cited a COVID-19 infection as his excuse for missing scheduled court hearings—despite previously denying the virus’s seriousness.
The case is raising broader concerns about the long-term mental health effects of professional MMA, particularly as Penn has taken considerable head trauma over the course of a nearly two-decade-long career. His erratic behavior and increasingly paranoid social media rants have led many to speculate about the possibility of chronic traumatic encephalopathy (CTE)—a condition he once publicly mocked.
Penn’s fall from grace has been tragic and highly public. Once revered as one of MMA’s most talented and fearless competitors, he now faces the possibility of forced psychiatric evaluation, criminal prosecution, and estrangement from his own family.
