He cited details of three of the seven most recent shootings to highlight what he called the quick reaction of his officers working the streets. He said investigators believe the victims in all three knew their shooters, and an arrest was made quickly in a homicide on Fulton Avenue. In another homicide on Bradford Street, Harrison said officers were close enough to hear gunfire, while at another homicide on Whittier Ave., police arrived “so quickly” that the assailants abandoned their car and fled. They got away and are still at large.