A fourth conviction has occurred in Matthew Perry's death case as a doctor pleaded guilty. The Department of Justice stated that Dr. Salvador Plasencia pleaded guilty to four counts of distribution of ketamine during a hearing on Wednesday, July 23, per ABC News. "Dr. Plasencia is profoundly remorseful for the treatment decisions he made while providing ketamine to Matthew Perry," his attorney, Karen Goldstein, said in a statement to the outlet. "He is fully accepting responsibility by pleading guilty to drug distribution.