Could Matthew Perry's Ketamine Suppliers Face Charges?

Published reports are indicating multiple individuals could face criminal charges for supplying Matthew Perry with ketamine. Perry was found dead in his hot tub on Oct. 28. According to the autopsy, "He was reported to be receiving ketamine infusion therapy for depression. His last known treatment was 1.5 weeks before his death. The ketamine in his system could not be from that." Authorities are not yet saying who provided Perry with the ketamine that killed him.