“Okay,” Rhyme announced, “until we find something else let’s assume they’re random victims of a crazy man.” He squinted at the pictures. “Where the hell’re the clocks?”

A call to the bomb squad revealed that they’d been cleared of any bio or toxic threat and were on their way to Rhyme’s right now.

The cash in the faux gold money clip appeared fresh out of an ATM machine. The bills were clean but Cooper found some good prints on the clip. Unfortunately, when he ran them through IAFIS, the FBI’s Integrated Automated Fingerprint Identification System, there were no hits. The few prints on the cash in Adams’s pocket came back negative as well, and the serial numbers revealed the bills hadn’t been flagged by the Treasury Department for possible involvement in money laundering or other crimes.

“The sand?” Rhyme asked, referring to the obscuring agent.

“Generic,” Cooper called, not looking up from the microscope. “Sort used in playgrounds rather than construction. I’ll check it for other trace.”

And no sand at the pier, Rhyme recalled Sachs telling him. Was that because, as she’d speculated, the perp was planning to return to the alley? Or simply because the substance wasn’t needed on the pier, where the brutal wind from the Hudson would sweep the scene clean?

“What about the span?” Rhyme asked.

“The what?”

“The bar the vic’s neck was crushed with. It’s a needle-eye span.” Rhyme had made a study of construction materials in the city, since a popular way to dispose of bodies was to dump them at job sites. Cooper and Sellitto weighed the length of metal—it was eighty-one pounds—and got it onto the examining table. The span was about six feet long, an inch wide and three inches high. A hole was drilled in each end. “They’re used mostly in shipbuilding, heavy equipment, cranes, antennas and bridges.”

“That’s gotta be the heaviest murder weapon I’ve ever seen,” Cooper said.

“Heavier than a Suburban?” asked Lincoln Rhyme, the man for whom precision was everything. He was referring to the case of the wife who’d run over her philandering husband with a very large SUV in the middle of Third Avenue several months earlier.

“Oh, that . . . his cheatin’ heart,” Cooper sang in a squeaky tenor. Then he tested for fingerprints and found none. He filed off some shavings from the rod. “Probably iron. I see evidence of oxidation.” A chemical test revealed that this was the case.

“No identifying markings?”

“Nope.”

Rhyme grimaced. “That’s a problem. There’ve got to be fifty sources in the metro area. . . . Wait. Amelia said there was some construction nearby—”

“Oh,” Pulaski said, “she had me check there and they weren’t using any metal bars like that. I forgot to mention it.”

“You forgot,” Rhyme muttered. “Well, I know the city’s doing some major work on the Queensboro Bridge. Let’s give ’em a try.” Rhyme said to Pulaski, “Call the work crew at the Queensboro and find out if spans’re being used there and, if so, are any missing.”