The officer who swung his boot has been stripped of his gun and badge pending an investigation of the incident, police said.
The NYPD declined to comment on the video or identify the suspect, who pleaded guilty to a lesser charge, which was later sealed.
The Brooklyn District Attorney’s Office said they also are investigating.
“My office is working with Commissioner Bratton to ensure that every member of the community is treated with dignity and respect,” District Attorney Ken Thompson said, in lieu of a spike in media coverage surrounding police brutality videos.