The judges

On a talent show, the judges pull faces at everything: shock, pain, laughter, despair. Those reactions get recorded and can be used for anything. Someone stitched them onto the anthem on a phone, and then the phone vanished from the studio. Four people and a phone: 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

• Aniceto, the eliminated contestant: He was knocked out in the first round. The judges' faces that day became more famous than he did.
• Beatriz, the judges' make-up artist: She touches up the judges between acts. She says some faces no foundation can cover.
• Carmo, the video editor: She has hours of judges' reactions filed by emotion. The "horror" folder is the biggest.
• Daniel, the studio security guard: He lets nobody in without a pass. The phone had no pass and got out anyway.