1. Officer that man attacked me with a knife/gun/baseball bat, it is laying by his right/left hand
2. I believed he was going to kill me, and was close enough to do it.
3. I was forced to fire to stop his attack, I am not sure how many rounds I fired, I stopped shooting when he stopped his attack
4. I will sign the complaint/I want to press charges
5. I want to cooperate fully, but I am really shaken up right now, so I don't want to answer anymore questions until my attorney is here
Hit the big five then shut up.
1. You are establishing the active dynamic. HE attacked YOU with Weapon X, and you pointed out the location of the weapon.
2. You established your reasonable belief that you were in immediate and otherwise unavoidable danger of death or grave bodily harm. In other words, he had Ability-Opportunity-Jeopardy working for him. The Three Legs Of Self Defense.
3. You Were Forced To Fire To Stop His Attack...Yes, his actions forced your actions in defense of your own life. Note, you did NOT say "I shot him". You Were Forced To Fire. You Were Forced To Fire. You Were Forced To Fire To Stop His Attack. There was no other way out...HE FORCED YOU to take the action you took.
3(a). Do NOT, NOT NOT NOT under any circumstances say how many rounds you fired even if you believe you know. Tachypsychia, occular occlusion, and simply losing count will probably make you perceive the number incorrectly. By saying "I am not sure" and "you stopped when HE stopped his attack" shows that you were calm, reasonable, and not acting recklessly. By stating that you were not sure, you're not giving possible prosecutors ammo to use to make you look like a liar if you say you fired three rounds, but actually fired five. I would avoid saying "I believe I fired three" because a shyster could use that to call your perception of the entire event into question.
"Mister citizen, you don't even know how many rounds you coldly fired into YOUR victim. How do we know you remember ANYTHING accurately about the event in which you GUNNED DOWN your victim, yet are claiming self defense?"
"Mister Scumbag lawyer, I wasn't keeping track of the number of rounds I fired. I was under a deadly attack by your client, and he forced me to fire those rounds to stop his attack. I stopped firing when he stopped the attack".
4. I will sign the complaint/I will press charges. This is one more statement from you that claims the status of intended victim of a deadly crime.
5. You are stating that you intend to be cooperative. You are shaken up...and you will be. You simply want to wait for your lawyer before you answer any more questions.
NOTE: Do NOT say "I am having chest pains" unless it is absolutely true. That is BAD advice from the Bubba Tactical Skool Of Gun Shootery. Saying you are shaken up is understandable and REASONABLE under the circumstances because any normal human being WILL be shaken up after a potentially deadly attack, and the possible taking of another human life. There are goobers who will say "Tell 'em yore havin a heart attack so they can't interrogate you!"...Any invocation of your rights to remain silent until your attorney is present will stop questioning. You don't need to be a LIAR to invoke your rights.
Being honest and reasonable is something responding officers will understand, and it will NOT give anyone ammo to use against you when your LIE is discovered and it WILL BE. You are not going to be waterboarded or exposed to "enhanced interrogation techniques". Responding officers will be smart enough to figure out what happened, especially if the c.h.u.d. you just blew out of his socks was a "regular customer" in their patrol district. They will most likely know him already, and they will have no special interest in screwing you over, especially if you hit the Big Five, remain calm (as calm as you are able in this situation), comply with their lawful instructions, and be HONEST.
Even if they handcuff you...do NOT resist and raise a ruckus. Being restrained initially is SOP in most places in a self defense situation, especially a lethal force scenario. Say "I understand why you have to do this temporarily, and I will be cooperative". The more cooperative you are, following the advice above, the less time you are likely to spend in handcuffs.
Remember...at this point, the ONLY thing officers know about you is that you just shot, and possibly killed another human being. In the initial moments after their arrival they will be securing the scene and making sure there is no continuing threat. Once done...you will probably be removed from the cuffs. BE CALM. Do not scream about injustice or anything like that. "I understand why you have to do this temporarily, and I will be cooperate with your instructions".