"The exact method of intake in Mr. Perry's case is unknown. There were trace amounts of ketamine detected in the stomach contents. He was reported to be receiving ketamine infusion therapy for depression and anxiety. Per the Medical Examiner Investigator’s report, his last known treatment was 1 w weeks Prior to death, and the ketamine in his system at death could | not be from that infusion therapy, since ketamine’s half-life is | 3 to 4 hours, or less."<p>"Toxicology testing reveals ketamine levels at 3540 ng/ml (3.54 microgram/ml or mg/L) in a peripheral blood source, and | 3271 ng/ml (3.27 microgram/ml or mg/L) in a central blood source | in Mr. Perry's system. For context, in monitored surgical- | anesthesiologic care, levels for general anesthesia are typically in the 1000-6000 ng/ml ranges"