A New York City Police Department (NYPD) upper level ("white shirt") was publicized, in video shown on television news, punching a protestor, in the October 15, 2011 Occupy Wall Street protests in New York City, with the highest number of protestors in Times Square.
(I do not associate with comments by the video posters or comment contributors.)
Yet a search produces several instances of police officers punching people.
Here is a list, chronological, from oldest, to newest:
Dates in parentheses are (UPLOAD DATES).
NYPD cops punch girl in face on 9.24.2011 (aftermath of punching, purported victim is held and carried by her arms by arresting officers, while she pleads, "please take his badge"): http://www.youtube.com/watch?v=pIM6p8aEgLA
NYPD Caught On Camera Punching #OccupyWallStreet Protestor In The Face (9/28/11):
NYPD Cop [white shirrt] punches [female] protester in the face during occupy wall street - 14 Oct: http://www.youtube.com/watch?v=bZrv6FkoSbM
NYPD Cop [white shirt] Punches [female] Protester at Occupy Wall Street, 10/14/11 (3 min version):
#OWS Police Punch Protestors - March On Times Square (10/15/11):
HORSES USED AS WEAPONS!-Protesters document NYPD horses ramming in Times Sq. (10/15/11):
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The most blatant of these police assaults is not yet available as a stand-alone video. This is a video currently being shown on the locally broadcast Times Warner cable channel NY1 (Video available!):
Updated 10/15/2011 05:16 PM
Two Dozen Arrests Made During "Occupy Wall Street" Protest, By: Erica Ferrari
Confrontations occurred between the police and protesters Friday. Violence was captured on video, as a high-ranking police officer could be seen punching a protester in the face. Another protester allegedly had his foot run over by an officer.
As such, police were out in full force Saturday, as protesters planned to march up to Times Square after gathering in Washington Square Park.
"We are going to enforce the law when it's violated," said Police Commissioner Ray Kelly.