A U.S. federal court has barred Dr. Mark Chavez from practicing medicine after he pleaded guilty to conspiracy related to the death of actor Matthew Perry, who died from a ketamine overdose in October 2023. Chavez, along with four other defendants, is accused of exploiting Perry's addiction by illegally supplying him with ketamine, a drug he had previously been prescribed for depression treatment. The court proceedings revealed that another doctor, Salvador Plasencia, allegedly sold the drug to Perry at exorbitant prices, while a woman known as 'the Ketamine Queen' also played a role in supplying the actor. Perry's tragic death, which occurred in his hot tub, has prompted a broader investigation into a criminal network distributing ketamine. The trials for the involved parties are set to commence in October, with severe penalties anticipated for those found guilty. Chavez expressed remorse for his involvement, emphasizing the tragedy of Perry's death rather than the actor's celebrity status.