Police are trying to establish a motive after an Adelaide man allegedly killed three of his neighbours and left a teenage boy and policeman fighting for life after a shooting spree. A woman at the house in the suburb of Hectorville survived the bloodshed but her parents and husband were killed and her 14-year-old son was shot and seriously injured. An 11 year-old boy staying at the house survived injury after hiding in a bedroom. The woman - who has not been named -... (GunPolicy.org)