Wiretaps at lunchtime

In a football agent's office, the phone rang every five minutes and there was always someone listening on the other end. Four people and one whistle: one person per row, one per column. Whoever is left alone with it in the same room is the one you're looking for.

Suspects

• Artur, the football agent: He has players at six clubs and phones in seven pockets.
• Benedita, the assistant: She books the meetings, takes the calls and distrusts anyone who says 'keep your voice down'.
• Claudino, the accountant: He does the company's books. The ones that add up and the others.
• Delmira, the telephone engineer: She came to fix the line that was making a strange noise. The strange noise was something else.