I like how all the statements from government employees imply "we are being nice." Like no, you're incompetent and this person did you a favor and you got butthurt that you look stupid and decided to jeopardize someone's life to throw a hissyfit and now you're backing off because you look even more stupid and refusing to admit it and so look even more childish than that. That's what happened. You didn't "decline to prosecute as is your prerogative." Just admit you were wrong, you might salvage some respect.