NEW : The driver is not in custody ; he 's going to be soon , police says . The son of the SUV driver says he did what he had to do to protect his family . Bikers chased the SUV , slashed its tires , forcing the driver to stop , police say . Another motorcyclist has been arrested on similar charges .
NEW : The motorcyclist is not in custody ; he 's expected to be soon , source says . The family of the SUV driver says he did what he had to do to protect his family . Bikers chased the SUV , slashed its tires , forcing the driver to stop , police say . Another motorcyclist has been arrested on misdemeanor charges .