Jeffery Deaver - XO

The CSU head tapped his forehead. “Trace metals in cigarette ash. Brilliant. I never thought of that.”

Rhyme said absently, “It’s the most definitive way to determine the brand and origin of cigarettes when all you have is ash. I vastly prefer a fleck of tobacco itself too, because then you can factor in desiccation and other absorbed trace substances. That can pinpoint location of storage and time.” He added a caveat, “Up to a point.”

Shean prepared the sample and ran the test and a short time later they had their answer.

Looking over the computer screen, Rhyme offered, “Zinc 351.18, iron 2785.74 and chromium 5.59. No arsenic. Yep, that’s Marlboro.”

“You know that?” Harutyun asked.

A shrug-one of the few gestures the criminalist was capable of-and one that he used with some frequency.

He announced, “I’ll say it’s likely that the same person was at both scenes. But remember, Person A could have been at the first site, smoking a Marlboro. Person B could have bummed one off him and set up the trap at the Mountain View Motel. Not likely but it could be. How long for the DNA?”

“Another few days.”

A grimace. “But it’s not any better in New York, of course. I don’t think you’ll find any, though. Your perp is smart. He probably lit it by blowing on the tip, not holding it in his lips. So, does this Edwin Sharp smoke?”

“He used to,” Dance said. “Still may sometimes but we don’t know.”

They couldn’t draw any conclusions from the boot print-really just the toe. Sachs studied the electrostatic print. “Agree that it’s probably a cowboy boot. Pretty common in New York a few years ago-line dancing was all the rage.” She added that Rhyme had compiled a footwear database but the electrostatic image was too fuzzy to give them a brand name.

“All right, the fishing line… nothing there, I’m afraid. ‘Generic’ is a word I dislike very much. Let’s look at the shell casings.”

Shean reiterated that he thought the gun at both the Blanton shooting and the Sheri Towne attack was probably the same.

“You can say ‘match,’” Rhyme said. “Won’t bite you, in this context. But where did the gun come from? Stolen from one of your officers, you were saying?”

“Possibly-Gabriel Fuentes. He’s been suspended.”

“I heard.”

“I wish we could tell. It might help incriminate Sharp. He was near Gabe’s car when the gun was stolen. But we don’t know for sure.”

“No? Let me have the close-ups of the extractor marks and scratches,” Rhyme said. “And the ones of the lands and grooves on the slugs.”

Shean placed them on a table for Rhyme to examine. “But we don’t have known samples from Gabe’s Glock. I asked him and-”

“I know you don’t.”

“Oh, right, otherwise we would have identified the gun.”

“Exactly.” Rhyme’s brow furrowed as he examined the pictures. “Sachs?”

Dance recalled that though they were both romantic and professional partners, they tended to refer to each other by their last names. Which she found rather charming.

Sachs studied the pictures too. Apparently she knew exactly what he was interested in. “I’d say four thousand.”

“Good,” Rhyme announced. Then: “I need the serial number of Fuentes’s gun.”

A fast computer search revealed it. Rhyme glanced at the number. “Okay, the gun was made four years ago by our talented friends in Austria. Call this Fuentes and ask him when he got it and how often he fired it.”

Harutyun made this call. He jotted notes and looked up. “You need anything else from Gabriel, Lincoln?”

“No. Not now. Maybe later. Don’t let him wander too far from his mobile.”

The answer was that he’d bought the weapon new-three years ago-and took it to the range twice a month or so. He would typically fire fifty rounds.

Rhyme gazed into the air over the local officers. “Fifty rounds, every two weeks, for three years means it’s been fired about thirty-nine hundred times. From the pictures of the shells and the slugs, Sachs estimated they came from a gun that had been fired about four thousand times. Good eye.” He glanced at her.

Sachs explained to the others, “The distension of the brass, cracks around the neck and the spread of the lands and grooves are typical of a gun fired with that frequency.”

Shean was nodding as if memorizing this. “So it is Gabe’s weapon.”

“Most likely,” Sachs said.

Rhyme called, “Microscope! Charlie, I need a ’scope.”

“Well, the scanning electron-”

“No, no, no. Obviously that’s not what I need. We’re not at the molecular level. Optics, optics!”

“Oh, sure.”

The man had a tech wheel over two heavy compound microscopes-one a biological, which illuminated translucent samples from beneath, and a metallurgic model, which shone light down on opaque samples. Shean was setting it up when Rhyme shooed him away. Using his right hand he prepared several slides from the trace and examined them one by one, using both of the scopes.

“And good job with the analysis of the trace, Charlie. Let me see the original printouts.”

Shean called them up and Rhyme studied the screen and then some of the samples visually. Peering through the eyepieces, he was muttering to himself. Dance couldn’t hear everything he said but caught an occasional, “Good, good… What the hell is that? Oh, bullshit… Hm, interesting… Good.”

Rhyme set slides out and pointed. “Fungi database on that one and I need a fast reagent test on those.”

A tech ran the reagent tests. But Charlie Shean said, “We don’t exactly have a fungus database.”

“Really?” Rhyme said. And gave the man a website, user name and pass code. In five minutes Shean was browsing through Rhyme’s own database on molds and fungi, jotting notes.

Eyes on the chart, Rhyme said, “‘Harutyun.’ Armenian.”

The detective nodded. “Big community here in Fresno.”

“I know.”

And how did Rhyme know that? Dance wondered. But speculating about the criminalist’s encyclopedic mind was useless. Some facts that even children knew he was completely ignorant of. Others, far more esoteric, were stored front and center. The key, she knew, was whether they had helped him analyze evidence or might help him do so in the future. She wouldn’t have been surprised to learn that he didn’t know the earth revolved around the sun.

Finally the results from the new tests were compiled and Rhyme reviewed them, as well as the results from the earlier analysis that Shean’s techs had run. It was raw data only but no one was better at turning raw data into something useful than Lincoln Rhyme. “Now, outside Edwin’s house. The fungus is often used in place of traditional toxic chemical pesticides and the mineral oil is also found in alternative pesticides.

“Also, at his house and at the convention center, the triglycerides… With that color temperature and melting point, I’d say it’s neatsfoot oil. That’s used for treating baseball gloves and leather sports equipment, equestrian tack and gunslings. Snipers buy a lot of it. Used to be made from cattle bones-‘neat’ is an old word for oxen or cow-but now it’s made mostly from lard. Hence the triglycerides.” He consulted the chart, frowning. “I don’t know about the ammonium oxalate. That’s going to take more digging. But the limonite, goethite and calcite? It’s gangue.”

“What’s that, ‘gangue’?” O’Neil asked.

“It’s by-product-generally unused materials produced in industrial operations. Those particular substances are often found in ore collection and processing. I also found the same materials in the trace at the public phone at Fresno College, where he called Kayleigh to announce one of the attacks.