Coffee with milk

In a café near the stadium, someone ordered 'a coffee with milk' over the phone and everyone understood something else. 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

• Amadeu, the café owner: He serves coffee to whoever passes by. To those who pass by twice, he serves it with milk.
• Benilde, the nine o'clock regular: She has breakfast there every day. She heard the whole conversation and pretended to read the paper.
• Crispim, the club's bus driver: He waits for the team at the door. He drinks too many coffees and tells too few stories.
• Dorinda, the counter assistant: She pulls coffees with one hand and answers the phone with the other. The phone never stopped ringing.