Pedro Casas, 71, is a retired neighborhood sociologist. He was fined 601 euros by a local police officer for using a megaphone during an authorized demonstration.

Casas says he did not make any unusual chants during those 90 minutes of protest. “I didn't dedicate myself to singing. I encouraged people,” he says. The protest was to demand the creation of a center for the memory of the Carabanchel prison, one of the places where Franco's repression was most exerted.