DeBarge Brother -- DeCHARGED in Drug Case, Arrest Warrant Issued

Mark DeBarge (from DeBarge) has been charged with drug possession after his arrest last month in a Hollywood hotel, TMZ has learned.

We broke the story ... Mark was busted along with a female companion in a Hollywood hotel room ... after the woman's parole officer stopped by for a routine check.

We're told the officer searched the room and observed narcotics -- unclear exactly what kind. Mark and his female companion were placed under arrest.

Now, Mark has been charged with felony drug possession in addition to misdemeanor possession of drug paraphernalia. Mark was also charged with possession of a fake ID.