I was aways told by the cops I've known that if a situation developed to say nothing to 911 other than pertinent facts such as name, address, shots fired, send LE/ambulance. Even 'I shot somebody trying to break into my house and he's dead' can be construed as premeditation, especially if your home appears to be a gun store and the assistant DA is an eager beaver looking for a scalp. Then you get the possibility of the very, very expensive process of proving yourself innocent. Heed any lawyer's advice in such a circumstance by keeping your mouth shut until you've been instructed what to say by competent counsel. The investigation will eventually sort it out, that's what they're paid to do.