Jason Davis -- grandson of oil mogul Marvin Davis -- was just charged with felony possession of a controlled substance stemming from his heroin arrest last month ... this according to the Orange County D.A.'s Office.
Davis -- who was arrested in Newport Beach, CA on January 27 -- was also charged with being under the influence of a controlled substance and possessing drug paraphernalia -- both misdemeanors.
According to legal documents, Davis was allegedly high on a "Central nervous system stimulant (prescription medication) and narcotic analgesic (painkillers)" at the time of his arrest.
Davis faces up to three years in prison If convicted of all charges.
Jason Davis Charged -- Felony Heroin Possession
2/23/2011 9:30 PM PST BY TMZ STAFF
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