This photo provided by the Jersey City Mayor's office shows Officer Melvin Santiago. Santiago was shot in the head while still in his police vehicle as he and his partner responded to an armed robbery call at a Walgreens Pharmacy at about 4.a.m., Jersey City Mayor Steven Fulop said in a statement. Fulop says Santiago was pronounced dead at Jersey City Medical Center. No other details about the officer were immediately released. Fulop said officers responding to the robbery call shot and killed the man who shot Santiago. He was not immediately identified. (AP Photo/Jersey City Mayor's office)