Another biker, 29-year-old Craig Wright of Brooklyn, was charged Monday in last week's high-speed chase that ended in an assault on a family's sport utility vehicle, NBC News reported.
Wright is believed to be seen on video punching and kicking the SUV driver, Alexian Lien, while he was on the ground, officials told NBC New York.
The bikers, participating in an unauthorized daredevil rally dubbed "Hollywood Stuntz" on Sept. 29, rode around Lien's vehicle on the West Side Highway in New York after he struck Christopher Cruz's rear tire. Cruz was charged with reckless driving and unlawful imprisonment for slowing down in front of Lien, who was forced to stop by other bikers before some of them began attacking the SUV, police said. His wife and small child were with him in the vehicle.
Police said Cruz, Wright and two other men have been arrested.
Police said they are also looking for a Long Island man.
Lien sped off, running over Edwin Mieses, who was standing in front of him. Mieses' attorney, Gloria Allred, said her client was trying to help Lien defuse the situation when he was run over. Mieses suffered a broken spine, a torn aortic valve and a punctured lung.
After the chase, the group trapped Lien, smashed his window with their helmets and beat him, police said. Lien was treated for his injuries and released from a New York hospital.
His wife, Rosalyn Ng, released a statement Thursday expressing sympathy for Mieses, but said her husband had no choice but to flee the bikers because it was a "life-threatening situation."
Lien and Mieses have not been charged.
At least three off-duty New York City police officers said they were part of the group, CBS News reported Monday.
One, a detective working undercover, said he witnessed the Sept. 29 attack, but did not intervene for fear of revealing his identity. None was identified but each will be stripped of their guns and badges and have been placed on desk duty, pending an investigation.
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