A masked guy breaks down your door w/o an Article III warrant absent exigent circumstances? Yeah, I’d agree. Trick will be that pressing the murder charge would be federal since a federal agent dies in the line of official work (though illegal), which would give the president grounds to push for death.
I cant remember the full details, but I do recall there was years ago where police busted into a house without a warrant (wrong house or something), didnt identify themselves, and the home owner… who I think was former military? Opened fire and took several of them out.
and was found innocent in the resulting trial.
But even better than that, he lived through the initial encounter and made it to the trial.