That was a Thursday night. A witness called the police to report the officers’ evident misconduct, but she did not have Sergeant Newberg’s name or other pertinent details. A couple of days later, the department’s body worn camera unit saw the footage as part of its now-routine review of all arrests, and officials there flagged it as a problem. Commissioner Harrison learned of it on Tuesday. Mr. Newberg was supposed to come in on overtime that day (more on that later) but was told to stay home. He was officially suspended as of Wednesday, which was when Mr. Harrison first saw the video, and by Thursday night, he had been arrested and charged with assault, false imprisonment and misconduct.