A person clearly has a reasonable expectation of privacy in his dorm room, and I have a hard time thinking of how making contact in a dorm room would lead to a search of his vehicle, which I assume would be parked a considerable distance away and unrelated to the initial call. If there was probable cause, they could have gotten a warrant. I'm guessing Wandale consented to two searches (the room and the car) that he didn't need to.
Obviously Wandale's biggest mistake was breaking the law and team rules in the first place, let alone in the same freaking dorm where his teammate just got busted and made headlines a few days ago. He should know better and he was being dumb. But then willingly giving up your rights on top of that was a critical error.
I'm always on the side of law and order and strongly recommend cooperating with police, but you also need to know your rights. Declining to consent to a search and exercising your rights is not a sign of being uncooperative. However, I also understand that being a young black man in that situation, facing the cops in a new town, probably added another element of uncertainty to the equation. It could have been avoided with better judgment in the first place (avoiding the weed). The young man needs some guidance at many levels.
Having said all that, I also think weed should be legal but regulated. There is a lot of potential nuance in this entire conversation.