"Consistent with the brisance," Cooper said. "You thinking C three or C four?" Cooper asked. RDX was the main component of these two plastic explosives, which were military; they were illegal for a civilian to possess.
"Not C three," Rhyme said, again smelling the explosive as if it were a vintage Bordeaux. "No sweet smell . . . Not sure. And strange . . . I smell something else . . . GC it, Mel."
The tech ran the sample through the gas chromatograph/mass spectrometer. This machine isolated elements in compounds and identified them. It could anal
yze samples as small as a millionth of a gram and, once it had determined what they were, could run the information through a database to determine, in many cases, brand names.
Cooper examined the results. "You're right, Lincoln. It's RDX. Also oil. And this is weird--starch . . . "
"Starch!" Rhyme cried. "That's what I smelled. It's guar flour . . . "
Cooper laughed as those very words popped up on the computer screen. "How'd you know?"
"Because it's military dynamite."
"But there's no nitroglycerine," Cooper protested. The active ingredient in dynamite.
"No, no, it's not real dynamite," Rhyme said. "It's a mixture of RDX, TNT, motor oil, and the guar flour. You don't see it very often."
"Military, huh?" Sellitto said. "Points to Hansen."
"That it does."
The tech mounted samples on his compound 'scope's stage.
The images appeared simultaneously on Rhyme's computer screen. Bits of fiber, wires, scraps, splinters, dust.
He was reminded of a similar image from years ago, though in circumstances very different. Looking through a heavy brass kaleidoscope he'd bought as a birthday present for a friend. Claire Trilling, beautiful and stylish. Rhyme had found the kaleidoscope in a store in SoHo. The two of them had spent an evening sharing a bottle of merlot and trying to guess what kind of exotic crystals or gemstones were making the astonishing images in the eyepiece. Finally, Claire, nearly as scientifically curious as Rhyme, had unscrewed the bottom of the tube and emptied the contents onto a table. They'd laughed. The objects were nothing more than scraps of metal, wood shavings, a broken paper clip, torn shreds from the Yellow Pages, thumbtacks.
Rhyme pushed those memories aside and concentrated on the objects he was seeing on the screen: A fragment of waxed manila paper--what the military dynamite had been wrapped in. Fibers--rayon and cotton--from the detonating cord the Dancer had tied around the dynamite, which would crumble too easily to mold around the cord. A fragment of aluminum and a tiny colored wire--from the electric blasting cap. More wire and an eraser-size piece of carbon from the battery.
"The timer," Rhyme called. "I want to see the timer."
Cooper lifted a small plastic bag from the table.
Inside was the still, cold heart of the bomb.
It was in nearly perfect shape, surprising Rhyme. Ah, your first slipup, he thought, speaking silently to the Dancer. Most bombers will pack explosives around the detonating system to destroy clues. But here the Dancer had accidentally placed the timer behind a thick steel lip in the metal housing that held the bomb. The lip had protected the timer from the blast.
Rhyme's neck stung as he strained forward, looking at the bent clock face.
Cooper scrutinized the device. "I've got the model number and manufacturer."
"Run everything through ERC."
The FBI's Explosives Reference Collection was the most extensive database on explosive devices in the world. It included information on all bombs reported in the United States as well as actual physical evidence from many of them. Certain items in the collection were antiques, dating back to the 1920s.
Cooper typed on his computer keyboard. Five seconds later his modem whistled and crackled.
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."