The police gather leads Encinas spent most of the day investigating the two murders at the crime scenes. Fortunately, the houses were not far from each other, but it still took him the rest of the day. The next day, he returned to the police station to report to Frutos and update his colleague Navarro. As soon as he entered, the officer at the reception desk handed him an envelope. ‘Inspector, this has been left for you,’ he said as he held out his hand with the letter. Encinas saw that it was indeed addressed to him: Fermín Encinas, Inspector. Fermín Encinas, Inspector.‘Who brought it?’ ‘A messenger delivered it. We x-rayed it and it looks clean.’ ‘Do we know the sender?’ ‘No. Sorry.’ ‘OK. Thanks,’ and he put the mysterious envelope in the inside pocket of his jacket. He would op

