I was recently pulled over and the officer came up to my window and immediately accused me and everyone in the car with me of smoking marijuana because she "could smell it when our car drove by." I am wondering if there is any way I could know in the future when a search of my car or self does not require my consent, and the officer is legally allowed to do as he or she pleases. Is claiming to smell marijuana enough of a probable cause? Is there any way I could defend myself in this situation?