He finished his dinner and his wine, played two moves in a chess match against himself, and then went upstairs to bed.

Lucinda was waiting up for him.

- The next morning they started fresh.

"Let's work," Aguilar said, "on the assumption that the Tapias, acting in concert with Nacho Esparza, took Barrera out of Puente Grande."

"Fair enough," Keller agreed.

"What is the operational corollary of that assumption?" Aguilar asked.

"We hit them," Vera said. "Make it too expensive for them to hide him."

They went at it hard.

Using SEIDO intelligence and information that Keller provided from DEA intelligence packages, they raided properties that Tapia or Esparza owned in Sinaloa, Durango, and Nayarit. They tracked down and questioned dozens of the two men's associates. They busted growers, dealers, shippers, and money launderers.

They turned up the heat, busting a shipment of Diego Tapia's cocaine, then a freighter full of the precursor chemicals that Esparza needed to cook his meth.

They made their agenda clear. The AFI troopers would throw the arrested men to the ground and scream, "Where is Adn Barrera?!" Then they turned them over to the SEIDO agents, who asked, over and over again, "Where is Adn Barrera?"

No one told them anything.

The raids netted drugs, weapons, computers, cell phones, but no solid leads as to Barrera's whereabouts.

Aguilar threw it right back on Keller.

"You're the Barrera expert," he said with no effort to disguise his sarcasm. "Perhaps you'd gift us with your expertise to find him."

Keller picked up the glove.

When he first arrived in Mexico City he checked in to his official housing near the embassy, but then went out and found a furnished apartment on the second floor of an art deco building on Avenida Vicente Surez in Colonia Condesa, within walking distance of the embassy but not close enough to be an American diplomatic ghetto. The bohemian neighborhood was all sidewalk cafes, bars, nightclubs, and bookstores.

A native Spanish speaker, Keller blended in easily. He moved his few things into the Condesa apartment and rarely went back to the official housing. The apartment was well stocked-his Sig Sauer, a 12-gauge Mossberg Tacstar 590 shotgun strapped under the bed, and a U.S. Navy Ka-Bar combat knife taped to the toilet water tank. I might be bait, he thought, but that doesn't mean I have to be a sitting duck.

After weeks of the futile search for Barrera, Keller burrowed himself into the Condesa apartment and went to work. Barrera had escaped from Puente Grande, so Keller started there, poring over the thousands of pages of transcript from the guards who had been arrested and interrogated.

If he didn't know better, the accounts were almost the stuff of fiction-Barrera's well-stocked luxury cell, the "movie nights," the imported prostitutes, Los Bateadores. Keller read about the former beauty queen Magda Beltrn, the family Christmas party, the riot the night of the escape. It was fascinating but shed no light as to where Barrera might be.

Keller started over, reading, rereading, and reading again the stories about Barrera's time in Puente Grande.

Then it hit him-a passing mention to a rumored attempt on Barrera's life that had happened, if it happened at all, on the volleyball court. The would-be assassin's body was later found with a neat bullet hole in the back of the head.

Keller phoned Aguilar. "Can you pull the file of a former prisoner, now deceased, Juan Cabray?"

"Yes, but why?"

"I need it to employ my expertise."

"Well then, by all means."

Keller went to the SEIDO offices to pick up the file.

Cabray was a career criminal who had worked for the old Sonora cartel and was apparently good with a knife. Not good enough, though, Keller thought. He set aside the question of who had ordered a hit on Barrera to consider Cabray.

Assume the story is true, Keller thought. Cabray took a stab, as it were, at Barrera and missed. Barrera's people executed him. Looking at the photo of Cabray's corpse, the bullet wound was clear, but Keller was more impressed by what he didn't see.

Signs of torture.

They would have worked on Cabray pretty good to find out who hired him, but the photo showed no bruises, no broken bones, no burn marks.

Cabray cooperated.

Keller dug deeper into his file and found out that Juan Cabray was from Los Elijos, in Durango state. He logged on to the computer and quickly got satellite images of the little village, tucked in a valley among remote mountains.

Durango was part of the so-called Golden Triangle, the mountainous intersection of Sinaloa, Durango, and Chihuahua that made up the prime opium and marijuana areas in Mexico.

It was in the heart of the Sinaloa cartel stronghold.

Keller convened a meeting of the Barrera Coordinating Committee and requested permission to ask for a U.S. satellite run over Los Elijos. It was a delicate suggestion, the Mexicans reluctant to accept foreign satellite surveillance over their country.

"It's absurd," Aguilar said. "Why would Barrera think of hiding in the village of a man who tried to kill him, moreover a man whom he ordered killed?"

"Just humor me," Keller said.

"Your expertise?" Aguilar asked.

"We're not making progress anywhere else," Vera said, shrugging. "Why not?"

"We can just send a plane over," Aguilar said.

"It has to be high-altitude," Keller said, "not a low flyover. I don't want to spook him. Let me ask for a satellite run."

Aguilar snorted but gave the necessary permission, Keller got on the horn to Taylor, and the satellite run was okayed.

Two days later, Keller was back at SEIDO with the photos laid out on the conference room table. He pointed to a small circle, a larger square, and a yet larger rectangle.

"This could be a new well," he says. "This...I don't know, maybe a school? The third shape, maybe a clinic. In any case, it's all new construction."

"What's your point?" Aguilar asked.

"This is a poor village. Suddenly there's all kinds of new construction on things that they need?"

"We have social development programs all over Mexico," Aguilar said.

"Can we find out-quietly-if there have been any in Los Elijos?" Keller asked. "Because if there haven't, I have an idea as to who's funded these projects."

"Let me guess-Adn Barrera," Aguilar said. "Oh, please."

"Where are you from?" Keller asked.

Aguilar looked surprised, but answered, "Mexico City."

Keller turned to Vera. "You?"

"Same."

"I spent years in the Triangle," Keller said. "I know the people, I know how they think, I know the culture. I've known Adn Barrera since he was twenty years old."

"So?"

"So the people of Los Elijos will think that Juan Cabray acted honorably," Keller said. "They'll further think that Adn Barrera responded nobly. Go from the supposition that, before he died, Cabray accepted Barrera as his patrn. Barrera has acted the role of patrn in the village-a well, a school, a clinic. They'd shelter him."

"I think you're reaching," Aguilar said.

"Do you have a better idea?" Keller asked.

Aguilar made some discreet calls and found that neither the federal nor state governments had development projects in Los Elijos. Likewise, there were no church or NGO activities there that he could discern.

Vera made the decision-AFI would launch a surprise dawn raid on Los Elijos.

Further satellite intel narrowed Barrera's most likely location down to the largest house in the village, at the end of a dirt road, a single-story limestone structure with a tiled roof and a low wall around the periphery.

"I hope that the beauty queen is with him," Vera said. "I would like to lay eyes on that specimen."

Keller looked at the satellite photos of the house in Los Elijos and said, "I'm going on the raid."

"We cannot run the risk of a North American agent being killed on Mexican soil," Aguilar said, although Keller suspected that what he really meant was that they couldn't run the risk of a North American agent killing a Mexican citizen on Mexican soil. Barrera's capture would be an exclusively Mexican operation, Aguilar asserted. No mention would be made of the DEA intelligence.

Advise and assist, Keller thought. "If anything happens to me, just bury me in the mountains."

"As tempting as that sounds," Aguilar said, "I'm afraid it's impossible."

"It was my intel that made this possible," Keller agued.

"How is that relevant?"

"Collegiality," Vera answered. "We owe him the courtesy as comrades-in-arms."

"If you're willing to take the responsibility," Aguilar huffed.

They were on a military flight to El Salto, Durango, that afternoon, and from there the AFI troopers got into trucks and SUVs and headed for the mountains. After driving all night, they arrived at the ridge above Los Elijos.

Now Keller sits shivering beside Aguilar.

Vera is in another vehicle with five of his troopers. The tactical plan is simple. At first light, Vera will give the word over the radio and the eight vehicles will race down the road into the village but drive straight through and then surround the large house at the end of the road and go in.

Hopefully, Barrera will be inside. If not, if he's somewhere else in the village, they'll have him isolated in the countryside and then can run him down.

That's the plan, anyway.

Aguilar's not buying it.

"This whole idea that Barrera has found sanctuary in Cabray's village is a romantic conceit," he said on the tortuous drive through the mountains, which aggravated his stomach as well as his psyche. Now he chews an antacid and looks down at the village.

With nothing else to do but wait, they actually start to talk, if only to break the tension and monotony. Keller learns things about the taciturn lawyer that he hadn't known, or maybe, he considers, never bothered to find out.

Aguilar has a wife and two teenage daughters, he attended Harvard as an undergraduate and thought it overrated, he's an ex-smoker, a devout Catholic, and almost as devout a fan of the guilas de America ftbol team.

"You?" Aguilar asks.

"Soccer? No."

"Family, I meant."

"Divorced," Keller answers. "Two kids-boy and a girl-grown up now."

"This job," Aguilar says, "is hard on family life. The hours, the secrecy..."

Keller knows that this is Aguilar trying to be kind and to find common ground. It's almost friendly, so he responds, "They say that DEA issues you a gun and a badge, not a wife and kids."

"I couldn't live without my family," Aguilar says, and then quickly adds, "I'm sorry, that was unkind, and I didn't mean it to be."

"No, I get it."

They're quiet for a while and then Aguilar ventures, "I've heard the stories about you and Barrera."

"Well, there are a lot of them."

"I think," Aguilar says, "that it is important to distinguish between revenge and justice."

Just when I was beginning to like you, Keller thinks, you have to get sanctimonious on me. "Have you ever been in a firefight before?"

"No," Aguilar answers. "Nor am I likely to now."

"I just wondered if you were nervous," Keller says. "It's understandable."

"All my previous combats have been in court," Aguilar says. "But, no, I'm not nervous. I'm merely irritated at this monumental waste of time and resources, neither of which we have to spare."

"Okay."

Aguilar glances at the Sig Sauer. "You are not to discharge that weapon, except in the most extreme exigency of self-defense."

"Where did you learn your English?" Keller asks.

"Harvard."

"Makes sense."