CHAIRPERSON
The first we knew of their presence outside was a loud banging on the door.   When we asked who was there, we got no reply.   We were terrified at this point, fearing that the killer had returned to hurt us.   We shouted again and I remember getting up and Cathy and I running - I myself running towards the door and Cathy screaming at me to get away from the doors and the windows.   Shouted again, "Who is it?", and they didn't identify themselves, but after three or four calls to them who was it, they said, "It's the police, open up". Why did they do that?   Why didn't they immediately identify themselves?   Why were they so brusque when they did come into the house?