“How’d he do?” Vann asked.

“The fact it stops at the tenth grade might tell you something.”

“No driver’s license or other sort of ID?” I asked.

“No,” Diaz said.

“What else?” Vann asked.

“He’s thirty-one and was in less than great health,” Diaz said. “Some liver damage and heart disease, and signs of incipient diabetes, which is not too surprising in someone with a Native American background. Missing a few teeth in the back. Also, that slash in his neck is consistent with a self-inflicted wound. He did it to himself and he did it with that broken glass you found.”

“Is this everything?” I asked.

Diaz smiled. “No, it’s not. I have something for you that I think you’re going to find really interesting.”

“Cut the suspense, Diaz,” Vann said. “Get to it.”

“They did an X-ray of his skull before they took out his brain,” Diaz said. He popped up the three-dimensional scan on Sani’s head. “Tell me what you see.”

“Holy shit,” I said, immediately.

“Huh,” Vann said, after a second.

The X-ray of Sani’s head showed a network of thin tendrils and coils in and around the brain, converging on five junctions distributed radially around the interior surface of the skull, the junctions themselves linked to one another in a mesh of connections.

It was an artificial neural network, designed to send and receive information from the brain, displayed in almost perfect detail.

Two groups of people had structures like these. I belonged to one of those groups. Vann belonged to the other.

“This dude’s an Integrator,” I said.

“What’s his brain structure?” Vann asked Diaz.

“The report says it’s consistent with someone who contracted Haden’s,” Diaz said. “And that’s consistent with his medical records, which show he had meningitis as a kid, which could mean the Haden’s variety. He’s got the brain structure to be an Integrator.”

“Shane,” Vann said, still looking at the X-ray.

“Yeah,” I said.

“Problems with this scenario,” Vann said.

I thought about it for a minute. “This guy didn’t get through high school,” I said, finally.

“So?” Vann said.

“So Integrator training is a post-graduate thing,” I said. “You undertake it after getting a suitable undergraduate degree, like psychology. What’s yours?”

“Biology,” Vann said. “American University.”

“Right,” I said. “Plus there’s supposed to be a raft of psychological and aptitude tests you have to clear before they let you into the program. It’s one of the reasons there’s so few Integrators.”

“Yes,” Vann said.

“It’s expensive, too. The training process.”

“Not for the student,” Vann said. “The NIH covers the costs.”

“They must have been pissed at you when you left,” I said.

“They got their money’s worth from me,” Vann said. “Bring it back around.”

“Okay, so the question here is, here is a guy who didn’t finish high school and who we have no record of anywhere outside of the Navajo Nation, which means he didn’t have Integrator training.” I pointed to the X-ray. “So how does this guy get all that wiring in his head?”

“That’s a good question,” Vann said. “It’s not the only question. What else is wrong about this picture?”

“What isn’t wrong about this picture?” I asked.

“I meant specifically.”

“Why would an Integrator want to integrate with another Integrator?” I asked.

“More specific than that.”

“I don’t know how to get more specific than that,” I said.

“Why would an Integrator want to integrate with another Integrator, and bring a headset?” Vann asked.

I looked at her blankly for a couple of seconds. Then, “Oh, shit, the headset.”

“Right,” Vann said.

“That reminds me,” Diaz said, to me. “I got inside that headset like you asked, to see if there was any useful information on those processor chips.”

“Was there?” I asked.

“No,” Diaz said. “There were no chips inside the headset.”

“If there are no chips inside, then it wouldn’t work. It’s a dummy headset,” I said.

“That would be my thinking, yes,” Diaz said.

I turned to Vann. “Seriously, what the hell is going on here?” I said.

“What do you mean?” Vann asked.

“I mean, what the hell is going here. We’ve got two Integrators, one of whom shouldn’t be an Integrator, and a dummy headset. It doesn’t make any sense.”

Vann turned to Diaz. “Fingerprints on the headset?”

“Yes,” he said. “They match Sani, not Bell.”

“So Sani brought the headset to the party, not Bell,” Vann said, then looked back at me. “What does that suggest to you?”

“Maybe that Bell didn’t know Sani was an Integrator,” I said. “And that Sani didn’t want him to know he was one, either.”

“Right,” Vann said.

“Okay, but again, why?” I asked. “What possible use is there for Sani to convince Bell that he’s just a tourist? Without the headset he can’t even be that. Unless there’s some Integrator-to-Integrator ability I don’t know about.”

“No,” Vann said. “There’s a sort of neural feedback loop that happens when you try to put one Integrator into the head of another. You can fry people’s brains that way.”

“Like Scanners?” I asked.

“Like what?”

“An old movie. About psychics. They could make your head blow up.”

Vann smiled. “Nothing that outwardly dramatic. But inwardly it’s not supposed to be pleasant. It’s blocked at the network level in any event.”

“So it couldn’t have been that,” I said. “Plus the whole suicide thing again.”

Vann was quiet again.

Then: “What time is it in Arizona?”

“It’s two hours behind here, so about eight thirty,” I said. “Maybe. Arizona is weird about time zones.”

“You need to go out there today and talk to some people,” Vann said.

“Me?”

“Yes, you,” Vann said. “You can get there in ten seconds for nothing.”

“There’s the small fact I will have no body,” I said.

“You’re not the only Haden on the FBI staff,” Vann said. “The Bureau keeps spare threeps at the major field offices. Phoenix will have one for you. It won’t be fancy”—she motioned to my threep—“but it will get the job done.”

“Are the Navajo going to cooperate with us?” I asked.

“If we let them know we’re trying to figure out the death of one of their own, they might come around,” Vann said. “I have a friend in the Phoenix office. I’ll see if he can make things easier. Let’s get you out there by ten their time.”

“I can’t just call?” I asked.

“You need to tell some family their son or dad is dead and then ask them a bunch of personal questions,” Vann said. “Yeah, no, you can’t just call.”

“It’ll be my first trip to Arizona,” I said.

“Hope you like hot,” Vann said.

*   *   *

At 10:05 I found myself in the Phoenix FBI field office, looking at a bald man.

“Agent Beresford?” I asked.

“Damn, that’s creepy,” the man said. “This threep’s been in the corner for three years without moving, and suddenly it gets up. It’s like a statue coming to life.”

“Surprise,” I said.

“I mean, we’ve been using it as a hat rack.”

“Sorry to deprive you of your office furniture.”

“It’s only for the day. You Shane?”

“That’s right.”

“Tom Beresford.” He held out his hand. I took it. “I don’t mind telling you I’ve never forgiven your dad for crushing the Suns in four.”

“Oh, that,” I said. He was talking about Dad’s second NBA title. “If it means anything, he always said that series was closer than it looked.”

“It’s nice of him to lie like that,” Beresford said. “Come on, I’ll take you down to meet Klah.”

I started walking and stopped. “Jesus,” I said, and started jerking my leg.

“Something wrong?” Beresford stopped and waited on me.

“You weren’t kidding when you said this thing didn’t move,” I said. “I think something’s rusted up in this thing.”

“I can get you a can of WD-40 if you want.”