[Dino.]

I would not provide aid. Why? Because, IMO, it can give the police the idea you werent sure you had to shoot. If you have to defend yourself, you life is threatened. You going to all of a sudden start helping the man? The man who forced you to shoot him because you thought he was a threat to your life. Helping him after could make it seem like there was less of a threat. The police/jury may believe you didn't have to shoot because you helped him after. This makes you look unsure of your decision to use deadly force. Call 911 and give them a detailed description of what happened. Allow them to deal with the wounded/dead man.

Excellent point.