“Go ahead.” Prior to the professor’s testimony, a security guard had wheeled a small table to the front of the courtroom. On top of it was a miniature door and, beside it, installed on a two-foot-high wooden block, was a Stealth Alarm. Gershwin knew exactly what the professor was about to do. “This is the alarm Mr. Cilantro was using.” Because of his enthusiasm, his voice boomed even louder. “Here’s what’s supposed to happen when someone breaks in through the front door.” He pretended to fiddle with the miniature doorknob. “I’ve just picked the lock,” he announced, pushing open the door. The keypad on the alarm lit up and the warning blips sounded. After a minute, the siren went off. He pressed a series of buttons on the control panel and it went silent. “Now I’m going to reactivate the

