After reviewing your report I have seen that Mix3rz indeed did handle the situation very poorly. I believe he should not have warned you as he was obviously running towards you and putting your life in danger. In any rea life situation if you are wanted by the cops and one is running after you, you would want to defend yourself.
As for how he handled it, it was very poor given you not understanding what you did wrong (although in my opinion you didn't) and him not explaining it. I can understand him muting you for the micspam though as you didn't turn it off as soon as he told you.
I will be speaking to Mix3rz about it, thank you for your report.