A former San Antonio police officer who shot a teenager while he sat in his car in a McDonald's parking lot has been arrested on two counts of assault, police said Tuesday.James Brennand, who was an officer with the San Antonio Police Department when the shooting occurred, turned himself in Tuesday and was arrested, Police Chief William McManus said.The police department filed two counts of aggravated assault by public servant against Brennand on Tuesday, police said.Brennand had abruptly opened the door, ordered Cantu to get out and opened fire when the car was put in reverse and backed up, police have said.He faces two counts of aggravated assault, because two people were in the car when the shots were fired, McManus said."