The shooting happened 11:40 p.m. on Thursday.
Surveillance images show a man, identified as Archer, approaching the driver’s side window of Officer Jesse Hartnett’s vehicle.
Images show the suspect pointing a gun at Hartnett’s vehicle, while another shows what appears to be the muzzle flash as he fires.
Another image shows the gunman with his arm in the vehicle.
Ross said there was no advance warning to the officer and that the suspect “just started firing.”
Hartnett, 33, is a five-year veteran of the force. He suffered extensive injuries to his arm, but authorities say he was awake and alert prior to that surgery.
Police say the suspect fired a total of 13 shots, three of which hit Hartnett in the arm.
Hartnett was able to return fire, striking the suspect three times, police say.