Police officers served an arrest warrant on a man at his workplace on charges of business fraud. At the time the man was arrested, the man was in his office, sitting at his desk. One officer handcuffed the man and walked him outside to the squad car. While the first officer was walking the man out of the building, another officer searched the man's desk drawers and a briefcase stored under the man's desk. At the squad car, the first officer searched the man's pockets and found a wallet, which he opened and also searched. The police discovered incriminating evidence in the desk, briefcase, and wallet. Before trial, the man challenged the validity of the searches and moved to exclude all the evidence. The court is in a jurisdiction that follows the majority rule.

Which of the searches (wallet, desk and briefcase), if any, is the court likely to find valid? Justify your answer.