An NYPD officer turned himself in to authorities Monday morning in connection with the assault of a 23-year-old man in July.

Raymond Crespo claims that Officer O'Keefe Thompson, 30, brutally attacked him July 8 in Coney Island after he refused to pick up a cup of ice that a friend knocked out of his hand.

Crespo was left concussed and with a bruised eye.

Thompson, who's been with the NYPD for three years, denies the charges and pleaded not guilty to charges of assault and intimidation of a witness at arraignment.

The judge on Monday issued an order of protection against Thompson, who is now suspended from the department. He is due back in court Nov. 29.

News 12 reached out to the police union for comment but has not yet heard back.