A California doctor charged in the overdose death of "Friends" star Matthew Perry has agreed to plead guilty to four counts of illegal distribution of the drug ketamine, according to a court filing on Monday (Jun 16). Salvador Plasencia, who operated an urgent care clinic in Malibu, faces up to 40 years in prison, according to a statement from prosecutors. He is expected to enter the guilty plea in the coming weeks. Plasencia was one of five people charged in the death of Perry at age 54. An