Show Me Going - Rosa Diaz

So in the Brooklyn Nine-Nine episode titled "Show Me Going" (5x20), Rosa goes to help other officers take down some shooters in Brooklyn Heights. The episode never shows the situation, only the squad's concern for Rosa back at the precinct. I've always wondered what happened exactly because Rosa avoids talking about it at the end of the episode. So I decided to write it myself! Obviously, the characters do not belong to me. I created a couple of characters just for the plot, and some of them are mentioned in the original episode's script (it'll make sense, trust me).

!!!!!!! TW: guns, shooting, fistfights, profanity !!!!!!!