Officer presence is the first level in the use of force continuum. It's you, in your uniform. As a state constable, in my spare time, I serve warrants. When you are cruising buy rural mail boxes, looking for a good address, it doesn't help to be driving the family mini van, people get really cranky. I have to buy all my own equipment. I got a squad car today. A geniune, 1987 Plymouth Fury with graphics and a cage. I'm commanding respect now.