California addiction rehab CEO, indicted on federal charges, died with fentanyl in his system

Tarek Greiss with his son (Courtesy Greiss family) 

Tarek Greiss struggled. The CEO of two addiction treatment centers often said he entered the world of recovery through the front door, as a client. And when he left this world, his passing may have underscored just how difficult staying sober can be.

Greiss, 51, was facing federal charges of conspiracy and paying for patients when he died at his Costa Mesa home on Aug. 6. It was the combined effects of fentanyl and acetaminophen — the main ingredient in Tylenol — that killed him, the autopsy report from the Orange County Coroner concluded. His death was ruled accidental.

“Tarek maintained his

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