I know it sucks for you, but you gotta see it from their point, too. Imagine if you had to make a quick emergency call after your partner got shot and your call to dispatch sounds something like this: "...............Sh.......sh.......sho.....shots...ffffffired...S...ss.....send...back...up.....t...t...to...XYZ...Street." Not making fun of you, I'm a stutterer myself and this is how it would sound like if I were to call something in, especially under very high stress. Also how do you plan on appearing authoritative in front of someone that doesn't respect or like you if you have troubles forming a sentence and maybe start making grimaces trying to get a sound out? In my country they reject you from the police force for having bad teeth and visible tattoos for the same reason. A stutter would just be too much of a detriment. I'm sorry, but this is a legit disability that you have to accept, just like someone that has bad eyesight cannot expect to be accepted as a fighter pilot.