I can’t blame the police or the prosecutor’s office for that one. It is why any responsible self-defense instructor will advise you to be the first to call the police after using a firearm for self-defense, and to become the complainant instead of the suspect. It is why you are wise to state this person attacked you (or whatever he did to lead to the shooting) and that you will sign a complaint to that effect. It is why you should point out evidence and witnesses before they disappear from the scene. Obviously, it is the worst possible time to answer detailed questions, but after establishing that the man who was shot was the attacker and you are the victim complainant, and pointing out evidence and witnesses, it is wise to answer any further questions with the promise of cooperation after you have spoken with legal counsel, which you obviously wish to contact soonest.