Looks like one of the bullets actually got him in the ear, as he grabs is ear right away. I thought it was from him getting tackled down by the secret service.
No clue. I would assume it was in front, I'm merely attempting to spread actual information, unfortunately it is from a less than reputable source, but looking at their timeline, they seem to be covering all possible snippets of information from the scene, without speculating on the motives of the shooter.