I am not at all sure it was on the door; it seems a very tacky amateurish place to put it. The story from the police changes each week; now they are saying it was a liquid - if a liquid was sprayed into a door handle most of it would drip onto the ground, did they not test the ground. I certainly do not buy into their being traces all over Salisbury either; this is just pure theatre to drag out the story and keep the public confused.