The investigation into Matthew Perry’s October 2023 death is now centered on where he got the ketamine, according to TMZ.

The Los Angeles Police Department, per the report, said it is working with the Drug Enforcement Administration to review the case involving the “Friends” star, who was 54 when authorities say he died from the acute effects of ketamine.

Per TMZ, investigators are looking for answers as to who provided the drug, and under what circumstances.

The “Friends” actor was found at an L.A.-area home of an apparent drowning. First responders reacted to a cardiac arrest call, and Perry was found in a jacuzzi. No drugs were found at the scene.

The actor had a history of drug and alcohol abuse, which he opened up about in a memoir he published last year. The star revealed he almost died in 2018 after a gastrointestinal perforation, spending months in the hospital.

“The doctors told my family that I had a 2 percent chance to live,” Perry said at the time.

A Los Angeles County Medical Examiner’s Office report noted in December that the actor had reportedly been clean for 19 months before his death.

A coroner said Perry had, per NBC News, utilized ketamine infusion therapy, which has grown increasingly popular to treat mental health issues, and had last done so 1½ weeks before his death.

Mark Heim is a reporter for The Alabama Media Group. Follow him on Twitter @Mark_Heim. He can be heard on “The Opening Kickoff” on WNSP-FM 105.5 FM in Mobile or on the free Sound of Mobile App from 6 to 9 a.m. daily.