LE is never held fully accountable. One poster above is someone who sat on review boards. To paraphrase his note to us: "LEO's brought before the board often took the easy way out and resigned". Uhh... there are not too many jobs where you can resign your way out of a murder charge. There are two sets of laws in the USA: One for them, and one for us. Ignore that fact at your peril.
Nothing will happen here other than "retraining". Mark my words.