'Multiple People' Could Be Charged in Matthew Perry's Death: Sources

As the investigation into Matthew Perry's death winds down, sources tell People exclusively that law enforcement officials believe "multiple people" should be charged. The Los Angeles Police Department, in coordination with the Drug Enforcement Administration and the US Postal Inspector, has been looking into where Perry got the ketamine that killed him; the actor was undergoing ketamine infusion therapy for depression and anxiety, but due to the timing of the last infusion he got, authorities believe the ketamine that was in his system at the time of his death came from elsewhere. (As Johns Hopkins reported earlier this year, the anesthetic was popularly used as a party drug for decades and is now often used off-label to treat a number of mental health conditions despite its lack of FDA approval for such uses.)

The sources aren't saying much more about the conclusions of the probe, and it will ultimately be up to the US Attorney's Office to decide whether to file any charges. Meanwhile, In Touch Weekly is reporting that Brooke Mueller was among those questioned amid the investigation. If her name sounds familiar, it's because she's Charlie Sheen's ex-wife, who has had her own substance abuse struggles over the years. Sources say Mueller and Perry became friends after meeting in rehab. They say she's spoken to law enforcement multiple times since his death, and that her iPhone and laptop were seized as part of the probe. (More Matthew Perry stories.)