I was pulled over for going 8mph over the speed limit, the officer smelled marijuana and I told him I had a little on me, he took it and put me in the back of the police car. About 30min later two cops showed up and searched my vehicle, I was released and was told I could get a letter from the king county prosecutors office. Do I need a lawyer? And what could happen to me? Also I am 18 years old and I'm a medical marijuana caregiver for a friend.