A few moments later the results of the request came back.

“Not good,” the bald man said, grimacing slightly, about as emotional as the technician ever got. “No specific profiles match this particular bomb.”

Nearly all bombers fall into a pattern when they make their devices—they learn a technique and stick pretty close to it. (Given the nature of their product it’s a good idea not to experiment too much.) If the parts of the Dancer’s bomb matched an earlier IED in, say, Florida or California, the team might be able to pick up additional clues from those bomb sites that could lead them to the man’s whereabouts. The rule of thumb is that if two bombs share at least four points of construction—soldered leads instead of taped, for instance, or analog versus digital timers—they were probably made by the same person or under his tutelage. The Dancer’s bomb several years ago in Wall Street was different from this one. But, Rhyme knew, this one was intended to serve a different purpose. That bomb was planted to hamper a crime scene investigation; this one, to blow a large airplane out of the sky. And if Rhyme knew anything about the Coffin Dancer, it was that he tailored his tools to the job.

“Gets worse?” Rhyme asked, reading Cooper’s face as the tech stared at the computer screen.

“The timer.”

Rhyme sighed. He understood. “How many billions and billions in production?”

“The Daiwana Corporation in Seoul sold a hundred and forty-two thousand of them last year. To retail stores, OEMs, and licensees. There’s no coding on them to tell where they were shipped.”

“Great. Just great.”

Cooper continued to read the screen. “Hm. The folks at ERC say they’re very interested in the device and hope we’ll add it to their database.”

“Oh, our number one priority,” Rhyme grumbled.

His shoulder muscles suddenly cramped and he had to lean back into the headrest of the wheelchair. He breathed deeply for a few minutes until the nearly unbearable pain subsided, then vanished. Sachs, the only one who noticed, stepped forward, but Rhyme shook his head toward her, said, “How many wires you make out, Mel?”

“Just two, it looks like.”

“Multichannel or fiber optic?”

“Nope. Just average-ordinary bell wire.”

“No shunts?”

“None.”

A shunt is a separate wire that completes the connection if a battery or timer wire is cut in an attempt to render the bomb safe. All sophisticated bombs have shunting mechanisms.

“Well,” Sellitto said, “that’s good news, isn’t it? Means he’s getting careless.”

But Rhyme believed just the opposite. “Don’t think so, Lon. The only point of a shunt is to make rendering safe tougher. Not having a shunt means he was confident enough the bomb wouldn’t be found and would blow up just like he’d planned—in the air.”

“This thing,” Dellray asked contemptuously, looking over the bomb components. “What kind of people’d our boy have to rub shoulders with to make something like this? I got good CIs knowing ’bout bomb suppliers.”