Michael glanced at the others. Mrs. Brewster nodded at him and smiled knowingly. “This is not exactly correct,” Jensen said. “The couch is pushed against the wall near the door.” “I beg your pardon, Professor.” Reichhardt spoke briefly into the thin microphone attached to his headset. The shadow couch melted away and appeared in the proper location. “Now I’d like to show you the edited record of a few hours in Professor Jensen’s life. The Shadow Program watched him nine days ago during a successful test of the system. Because the professor has a home security system, we know exactly when he leaves his apartment. Professor Jensen’s mobile phone and his car’s GPS system allow us to track his trip to a local shopping area. Two surveillance cameras are in the parking lot. The professor is photographed and a facial algorithm confirms his identity. The discount shopping card in Jensen’s wallet comes with an embedded RFID chip. It informs a computer when he’s entered a particular store.
