The brother of a man shot dead by an off-duty New York City police officer in a confrontation at a car window says relatives feel vindicated by a security camera video that has cast doubt on the early police account of the encounter.

Delrawn Small's brother spoke at a news conference Thursday.

Police initially said they believed Officer Wayne Isaacs opened fire July 4 after Small reached through the officer's window and repeatedly punched him in the head. Then a grainy video showed that virtually the moment Small walked up to the window he recoiled and soon collapsed.

The officer has been stripped of his badge and gun as the New York Police Department and the state attorney general's office investigate. The union representing him has declined to comment.