No you have it wrong. Police are not judge and jury.It's OK that you've made your mind up before the grand jury has convened and heard and resolved the many conflicting accounts. You're not getting paid by that community to at least pretend to be impartial in an active investigation involving one of your own who might be guilty of, and charged with, a felony, up to and including murder. Or, he might be innocent. We don't know because none of us have seen or heard the conflicting evidence. We might never know what really happened.
But in the meantime, it's a bit stunning that you think it's OK for those people paid to be impartial to declare they aren't to the people who pay their salaries to serve them. All it takes to know it's wrong by the police is to take the tiny step and put yourselves in the shoes of that community.
Don't know, and it doesn't matter. You just said bracelets shouldn't be worn if people want to maintain professionalism. You didn't qualify that with what they said...OK, I can't read the bracelet - what does it say?