Internal Affairs is investigating the circumstances of an arrest, captured on video, that shows a plainclothes cop repeatedly punching a teen suspect in the body as three uniformed cops were trying to subdue and handcuff him, police said. “Hey! Hey! Hey!” one woman is heard yelling. “Stop it! Get off of him!”

Police said two suspects, including the one struck, were arrested for assaulting another person with a cane.

Another woman can be heard identifying herself as a lawyer and saying the suspect is only 12 years old. “I can’t believe he just did that after everything that’s happened,” she said, an apparent reference to the Eric Garner case and other incidents captured on video.