I have had a chance to see the video and found many things that were done wrong. The first thing the officer should have done was to call for a backup officer to assist him since there was such a large crowd at the location. The punch to the face was not the right thing to do because at the time the officer punched the suspect, he was being physically assaulted. The officer was more than one foot away from the suspect. He should have used his O/C to get the suspects to comply.
The officer continued to struggle with the first suspect with the crowd getting very close to him, but should hav