Forget you have used brass or shot shells in your vehicle and drive through DC and you're toast. Spent brass is illegal to have, unless you're a licensed DC resident. So, if you drive up there make sure you have no brass on you.
Warning: D.C. cops under orders to arrest tourists with empty bullet casings | WashingtonExaminer.com
Warning: D.C. cops under orders to arrest tourists with empty bullet casings | WashingtonExaminer.com