Transcript for Undercover Police Officer Charged Over NYC Motorcycle Road Rage
And mere in new york, a new twist in that road rage incident. A young family's car was swarmed by bikers, the father beaten, and tonight, a police officer who was on the scene is facing charges, caught on tape not helping that family, but taking part in the chaos. Abc's dan harris reports. Reporter: Late today in manhattan, the spectacle of an elite undercover police detective hustled out of court with his head covered after being charged in the road rage incident that has riveted america for ten days now. Prosecutors say wojciech braszczok, seen here, later joined in the attack by repeatedly kicking their suv with a 2-year-old girl in the backseat. The department was an active participant of a mob of motorcyclists chasing, capturizing and terrorizing this family. Reporter: Braszczok was not undercover at the time of the beating. He was off-duty, riding with the bikers as they marauded through new york city, provoking 200 911 calls. 34ris say up to five offduty cops might have been in the group. What's so scary about this videotape is that it has a "mad max" feel to it. A sort of lawlessness, and within the gang of bikers, what makes it worse, you have cops in that gang. Police officers who are present don't even take affirmative action. Outrageous. Reporter: Braszczok's attorney seemed to turn the blame back around on the victim. We keep forgetting that mr. Lien rain ovran over someone. Reporter: Braszczok truly is part of the nypd elite. He's a member of the intel unit. They infiltrate groups deemed to be suspicious. Braszczok reportedly lived under cover among the occupy wall street protesters and here he is now, facing these serious charges. That is so hard to understand. Dan, thank you very much.
This transcript has been automatically generated and may not be 100% accurate.