Here is my personal problem with all the above. I’m my own lawyer, but in the heat of the aftermath of a shooting, it would be hard to remember to call one of my old partners, rather than answer questions myself.
Secondly, directing the course of the investigation is not an option. SOMEONE will. If not you; them!
That is why you have your lawyer do it. Nothing he says is admissible in evidence. And, if the facts turn out to be a little different than your first reaction, you can correct them with out being called a liar.
It wouldn’t take a shooting to get me to clam up to law enforcement. I’d help direct them to a fleeing felon or report a crime, but if they want to do fact finding, they are going to have to have a really good reason or hear it from my attorney.
Sadly, the police have forfeited their right to have cooperation by lying to ordinary people about their motives and investigations.