Question: X, a highway patrol officer, stopped a vehicle on the freeway for speeding. Prior to issuing a ticket for speeding, X looked around the car and asked the driver to open the glove compartment. The driver voluntarily complied. Drugs were found in the glove compartment. X then arrested the driver and searched the whole car, including a briefcase marked "private" that was found in the trunk of the car. Was the search of the trunk valid? Was the search of the briefcase valid? Justify your answers.