What is the penalty for Marijuana possession in Washington DC dc?

if you are under 21 years of age, and get caught by the cops smoking weed, you will be given a warning, they wont even call parents, they will just write down your information, and confiscate the herb. a "friend of mine" got caught the other day smoking with some people, and the police took the 20 stack back to his mom as well as his paraphernalia, because he told him that his mom didn't mind him doing it. It was all good because his mom gave it back to him, so all that happened was his name got written down. that was it. SEATTLE WA