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.
That’s jury nullification. The sandwich guy is a perfect example.
By the letter of the law, he did commit assault. Nobody denies what he did, but the jury decided it was unreasonable.