Getty

Norman Reedus and Helena Christensen 's son Mingus has been slapped with additional charges following his arrest for allegedly roughing up a female Saturday.

The troubled model appeared in Manhattan Criminal Court Saturday evening ... and he was charged with reckless physical injury, aggravated harassment and second-degree harassment, court records show. Getty

As we reported ... he was originally busted Saturday for alleged third-degree assault and obstruction of breathing after officers were called to a Manhattan apartment for an assault in progress on a 33-year-old woman.

He pleaded not guilty to all charges.

His attorney, Priya Chaudhry , tells TMZ the prosecutor charging her client with "misdemeanors or less ... speaks volumes, and much louder than the unsup

See Full Page