Question: A and B were roommates in a dormitory but only for a few days because it was the start of the semester. On their third evening together, the campus police knocked on their door and asked if they could come in and "look around." When asked why, they told both occupants that they had reports from the other dormitory occupants that drugs were being sold from the room. A, a psychology major, readily gave consent, but B, a criminal justice student, refused to give consent, saying the police had to have a warrant based on probable cause to be able to come in. Based on A's consent, the police entered the room anyway and found drugs-ironically, on the desk owned by A. The police seized the drugs. Prosecuted for drug possession and sale, A sought exclusion of the evidence, saying his roommate had expressly objected to the police entry. You are the judge. Will you admit or exclude the evidence against A? Justify your answer based on cases decided by the Court.