then at least the report given by his friend who he was facetiming said the airman told his friend he didn't know who was at the door (cop called out too quietly?). the airman asked who was there- gave the cop the chance to reiterate his identity. cop didn't do that or again did too quietly. then shot immediately upon the door being opened, did not give any verbal commands, and the airman didn't make any hostile moves or raise the gun toward him.