Once the cops have been called, you don’t need to be running around outside with a gun in your hand. The chances for a blue-on-blue shooting skyrocket in incidences like that. Plainclothes officers get shot all the damn time in similar circumstances. It’s easy to tell who the responding officers are because they show up in a car with blinking lights and they’re all dressed the same. You want to not be on the playing field wearing the other team’s uniform when they show up.
From Tam. Emphasis added.
The way she phrased it is novel and I think really drives the point home.