When police arrived, Ron had dropped the knife, but was now hiding in a closet with Ariana.
Cops forced their way into the closet and were able to usher Ariana to safety. But Ronnie still refused to come peacefully.
That's when police decided to rase Magro in order to subdue him.
Fox 11 LA reports that a semi-conscious Magro was led from the scene on a gurney and loaded into an ambulance.
Police tell TMZ that Magro will be arraigned as soon as doctors give the go-ahead.
Off the Wagon
Jen told police that Ronnie had been doing cocaine, which may help to explain his erratic behavior.