Cite one. No DA or anyone else is charging a law abiding person with saving their life. In fact, there was a story here in NY where a guy had an illegal pistol and used it against a home invader. All charges dropped. This was an illegal possessed pistol. Not one that is lawful and handed off in an emergency. It still was deemed to not warrant the charge of CPW.Oh, certainly you arm whomever with whatever.
But don't be so naive to think that they won’t bring charges later.
You have this attachment to the idea that the letter of the law matters more than the DA's politics. I would think there are more than enough recent examples to convince you otherwise.