The question of who can give valid consent to enter and search private premises has been the subject of numerous Supreme Court opinions.
• In the 1974 case of U.S. v. Matlock, the court upheld consent given by one tenant while the other tenant was seated in a police car nearby. In its ruling, the court said this: "The consent of one who possesses common authority over premises or effects is valid against the absent, nonconsenting person with whom that authority is shared."
• Illinois v. Rodriguez, in 1990, upheld consent given by the suspect's live-in girlfriend while he slept inside. Even though police later learned that the girlfriend no longer lived in the apartment and therefore lacked actual authority over the premises, it was enough that she had apparent authority to consent.
• In both Matlock and Rodriguez, the joint-tenant suspect was not at the doorway objecting when consent was given. The importance of that fact was the subject of Georgia v. Randolph, in 2006. Mrs. Randolph told officers at her doorway that her husband had drugs inside. Mr. Randolph was standing at the doorway and refused the officers' request for consent to enter and search. Officers then asked his wife, who consented.
The Supreme Court held that under those circumstances, police could not rely on the wife's consent. Randolph held that if one occupant is present and objecting, the other occupant cannot give effective consent. And in dictum, the court suggested that co-occupant consent would still be invalid "if there is evidence that the police have removed the potentially objecting tenant from the entrance for the sake of avoiding a possible objection." (Randolph was covered in the May 2006 issue of POLICE Magazine.)