When a bullet is discharged from

a rifle barrel, the mass of air displaced with the bullet is immediately replaced by the force of atmospheric pressure. This pressure is not selective and draws the immediately available air into the vacuum of the barrel instantly. The source of the air is that most immediately available. In the case of Robin Bain's suicide the air most readily available to relieve the vacuum in the barrel contained the high speed spatter from the contact wound to his head, this was already driven toward the silencer tip as it exited from his skull. That is how his dna was found inside the rifle, his blood was taken by atmospheric pressure because it was in the air immediately available to the rifle barell, right at the tip of the silencer Robin rested his head against.

The clear science of Bain's suicide is apparent, nothing in science can contradict that he suicided. There was no gravity fed blood found in the rifle Robin killed himself with, no slow motion of his death and the expulsion of his blood from his skull, it was high speed spatter, capable of passage into the barrel and onto the curtains, not slowly falling drops, but blood and brain matter drawn in where he had rested his temple against the barrel. Bring out your science hang-bainers, enough of your crap and Bryan Bruce documentaries about photo-copiers. Front up you un-homed dogs of mixed breeds.