Bews, Myall and Jeremy, all saw someone who was alive inside the main bedroom, which caused Bews to return to the patrol car parked up in Pages lane, where he passed a situation report about what he had just seen, requesting that the firearms be deployed to the scene, which is what occurred. The fireams team did not just turn out to investigate a trick of light, they attended because what Bews told the control room, warranted dealing with...
It doesn't matter who said what to whom on the telephone, what matters most is that at the time police told Jeremy that all his family had been killed, he automatically presumed police had shot them when they forced thier way into the farmhouse.He had evrry reason to believe that until police actually went into the premises, that everyone was still very much alive. He had been talking to his father on the phone and knew he was alive, and because his father had not said anyone had been shot, why on earth should he think everybody else must be dead? Futhermore, tge behaviour of the police at the scene conditioned his mind to thonl that spmeone was alive inside the premises, becaise the police were negotiating with them by various means, and Jeremy must have thought that whatever was being spoken about was what was preventing the police from going into the premises...