Law enforcement officials believe ‘multiple people’ should be charged in connection with Matthew Perry’s ketamine death: Source (exclusive)

A law enforcement investigative source told PEOPLE that their investigation into Matthew Perry’s ketamine death is “nearing completion” and police believe “multiple people” should be charged.

The source says the final decision on whether or not to file charges will rest with the U.S. Attorney’s Office.

PEOPLE’s call to the U.S. Attorney’s Office was not immediately returned on Tuesday, June 25.

The previous Friends Star died on October 28 at the age of 54.

His cause of death was ruled an accident. An autopsy report obtained by PEOPLE in December showed he died from the acute effects of ketamine, with other contributing factors including drowning, coronary artery disease and the effects of buprenorphine, a drug used to treat opioid addiction, the report said.

In December, the Los Angeles County Medical Examiner’s Office completed its investigation into his death, PEOPLE reported at the time. In May, the LAPD told PEOPLE that following the release of the medical examiner’s report, the LAPD had launched an investigation into the circumstances of his overdose death.

In May, an LAPD investigative source told PEOPLE that the department was working with the DEA and the U.S. Postal Inspector to determine where the ketamine that killed Perry came from. The police investigation began in December after the medical examiner’s report was released.

PEOPLE’s June 25 request for comment to the DEA did not receive an immediate response.

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According to his autopsy, Perry was undergoing ketamine infusion therapy at the time of his death. A year before his death, he spoke in his memoirs Friends, lovers and the big, terrible thing about his struggle with addiction.

“I wanted to tell it when I was sure I wasn’t going back to the dark side,” Perry told PEOPLE for a 2022 cover story. “I had to wait until I was pretty sure I was sober – and away from the active disease of alcoholism and addiction – to write it all down. I was pretty sure it would help people if I did.”

If you or someone you know is struggling with substance abuse, please call the SAMHSA Helpline at 1-800-662-HELP.