I’m no CSI but can we maybe try talk about the scene of the crime for a second.
Hal is on a lower seat leaning slightly forward with his hands on his lap in a sense.
If he didn’t want to die wouldn’t he raise his arms ? Meaning once the bullet killed him he would have dropped differently, potentially causing his body to shift with the force.
Then he might have fallen side ways of sloughed over. I think the body position is trying to tell us more than we think
Its a little obvious he knew his killer and maybe was in on it