“Can’t say for sure but I found some on the doorstep of Java Hut, on the knob and on a fragment of the IED.”

Sachs nodded. Artichokes. Curious but that’s how crime scene work went. Many pieces to the puzzle.

“Nothing else.”

“That’s it for the Java Hut?”

“Yep.”

“So we still don’t know who planted the bomb.”

Then she and Cooper turned to the Lydia Foster scene.

“First,” the tech said, nodding at the photos of her body, “the knife wounds. They look unusual, very narrow. But there’s no database to let us know.”

The United States, home of the National Rifle Association, was the gunshot capital of the world. Death by knife was common in the United Kingdom and other countries with strict gun control laws but in America, with the ubiquity of guns, knives were relatively rare weapons in homicides. So no law enforcement agency had compiled a knife wound computer image database, at least none that Sachs and Rhyme knew about.

Even though she was sure he’d worn gloves, Sachs had still lifted prints from around—and on—Lydia Foster’s corpse. You never knew if a perp might have taken his gloves off at some point. But as with Java Hut, these came back from the automated database negative.

“Didn’t expect anything different,” she muttered. “But I found a hair that didn’t match the samplars. There, in the envelope.” Sachs handed it to the tech. “Brown and short. Might be the perp’s. Remember Corporal Poitier said the man checking out Moreno’s suite the day before the killing had short brown hair. Oh, the follicle’s attached.”

“Good. I’ll get it to CODIS.”

The nationwide DNA database was expanding at an exponential rate. Whoever the hair belonged to might be in the system; if so, they’d have his identity and, possibly, his present whereabouts soon.

Sachs began looking through the rest of the evidence. Though the killer had taken every single document, computer and media storage device that might have mentioned Robert Moreno, she had found something that might be relevant. A Starbucks receipt. The date and time printed at the top indicated the afternoon of May 1. Sachs recalled that this was probably when Moreno had his private meeting, the one Lydia had not attended. It might be possible to identify the office where the activist went.

Tomorrow she’d go to the location—a building on Chambers Street.

Sachs and Cooper went through the rest of the trace from Lydia’s apartment but weren’t able to isolate very much. Cooper ran a sample through the gas chromatograph and looked up toward the women. “Got something here. A plant. It’s Glycyrrhiza glabra—a legume, sort of like a bean or pea. Basically, it’s licorice.”

Sachs said, “Anise or fennel?”

“No, no relation, though the tastes are similar.”