No one else would be needed for the job, he said, and there'd be no reason to tell anyone else about it. Telling somebody else would just be an unnecessary risk.

"First, I thought it was somebody in the group," Lucas said. "They'd committed a murder, inadvertently, and I thought the killer was probably wiping out anyone who could pin the murder on him. And I thought it had to be the doc. Everybody else we know about were friends, and knew each other forever, and now they're all dead. So the doc must be the killer.

"But then the doc was killed. And the doc… I don't see him as a longtime friend of this bunch. The Macks don't have medical friends."

"You're making a logical case for the existence of at least one more guy," Virgil said, "which we already know, unless the doc beat himself to death."

"But one more guy wouldn't have any function in the holdup. And that guy didn't know what happened to the drugs, because he had to torture Lyle Mack to get the information. So he's a total outsider. Then, the way Lyle Mack was tortured, I thought it had to be two guys, one guy sitting in the chair, pinning Mack to the floor, the other guy cutting on him. And that powder on him… I thought the other guy was the doc. The guy who did the cutting."

Virgil said, "Logically, if there could be one outsider, there could be ten outsiders. All the Macks had to do was tell one guy, and the outsider gets his gang together and hijacks the robbery. You don't need the doctor and…" Virgil paused, mid-screed, and then said, "No, that's not right, is it?"

"I don't think so," Lucas said. "Did the Macks tell everybody they knew what they were doing? Why would they do that? And why would the outsiders kill everybody in the gang, if they weren't involved in the pharmacy murder? If all they wanted was the drugs, if they were outsiders, they could have tortured Lyle Mack and killed Ike, and nobody would have known who they were. So why did they kill the doc? How'd they even know about the doc? Why did they make a run at Weather?"

"That could have been Joe Mack or Haines or Chapman, right?"

"No. Haines and Chapman were already dead. The autopsy suggests they were killed the day of the robbery. At least twenty-four hours before Weather was attacked. Weather says the biker was a small guy, and Joe Mack is notably large."

"So there's at least one other guy," Virgil said. "The guy who killed Jill MacBride. That's some outsider DNA, right?"

"If it doesn't belong to the doc." Lucas thought about it for a minute, then said, "But it won't belong to the doc, because the guy who killed Jill MacBride is the guy who tortured Lyle Mack. Same cold killer. Same…"

He stopped and turned away from Virgil and said, "Oh, Jesus."

"What?"

"How did the guy who killed Jill MacBride get to the airport? And how did Joe get out? MacBride's car was still there… Somebody picked him up, and killed MacBride, right? The killer picked up Joe Mack. Joe either called him, or Lyle Mack called him and sent him over to pick up Joe. We know Joe Mack talked to Lyle, after he ran."

"They could have taken the train in and out," Virgil said. "But it's about nine hundred and ninety-nine to one that they drove."

Lucas stood up, suddenly excited: "You know what? You know what? The day Joe Mack ran, he was signing his van over to a skinhead. He signed the paper, but the guy never gave Joe any money. No check, nothing. Nothing we saw. I suppose the skinhead could have given Joe a wad of cash ahead of time, but that usually doesn't get done, you know, until the papers are signed. They were either friends, or Joe Mack owed him big. And this was a hard-looking guy."

Virgil's eyebrows went up. "The skinhead-what does he look like?"

"You know, a skinhead," Lucas said. "Probably twenty-five, wind-burned face, skinny, muscles in his face…"

Virgil leaned forward, intent. "Man, I've seen that guy, wandering around by the twins' team, doing nothing," Virgil said. "An orderly, or a whatever, a nurse. He's wearing a hospital uniform. I've seen him a couple times. I'm always catching his eyes-"

Lucas snapped his fingers: dug out his cell phone, called the duty officer: "I need the tag numbers of a van owned by a Joe Mack, M-A-C-K, sold in the last few days… I can wait."

They waited, no more than a minute, and the duty officer came back. "We've got a Joe Mack as the owner of a 2006 Dodge Grand Caravan cargo van, white in color, but there's no transfer come through."

"You got the tags?"

"Yeah. You want them?"

"No. Get onto the airport cops, find out if those tags came into the airport…"

Lucas gave him time and date and said he'd wait again. The duty officer came back after two minutes and said that it'd be another two minutes; and came back and said, "Well, you got it. The van came in at ten forty-two and was out at eleven-oheight."

"Thank you. Get all the numbers, tell the airport cops to be careful with the data, see if they've got a face in their van photo. Get back to me."

He clicked off and said to Virgil: "Got him. It's our skinhead. Goddamnit, we should have scanned all the tags coming in and out around the time of the MacBride murder. It would have kicked out Joe Mack's van. I mean, I saw the guy."

"And if it's the same guy I saw…"

"Where's Weather right now?" Lucas asked.

"Either operating or up in the observation room." They both stood up and Virgil said, "This way," and as they hurried back toward the elevators, they both reached down and touched their weapons.

Lucas said, "He's maybe got hand grenades."

"I was just thinking that," Virgil said. "Shoot first, ask questions later." WEATHER OPENED the operation as she did each day, moving fast now. Moving fast, she was in and out in ten minutes, laying bare the ring of bone that connected Ellen and Sara. Most of the bone had been taken out, and Hanson, at her elbow, was ready to take out all but about a centimeter of the rest of it.

"Anything I can do before I go?" Weather asked him.

"I could use a couple more sterile hands in close," he said.

She stayed, to help hold the babies' heads, six hands in close and tight. Maret asked, through the crowd, "Hearts?"

"Okay so far," somebody answered from the back.

The saw, in cutting through the bone, kicked up the stink of raw blood mixed with something else… almost a floral scent. Dead peonies, maybe.

Hanson was a half hour, against an estimate of forty minutes. His mask was dotted with sweat when he backed away. "We're good."

The neurosurgeons moved up.

Weather backed out, stripped off the operating gear, dumped it, washed, and walked down to talk to the Rayneses again.

Lucy, anxious, wide-eyed. "Is something wrong? You were gone so long…"

"I stayed to help with some bone removal. At this point, their hearts are stable, we've got everything but the last half-inch of bone out. Rick can take that out in one minute if he has to."

Larry: "So the neuro guys are working?"

"Yes. Still a way to go," Weather said.

They talked for a couple more minutes; the Rayneses said the overnight crew had reported that the twins had gotten their best sleep since the operation began.

A team nurse popped in, looked at Weather: "Gabe wants you in the OR."

"Something happened?" Larry Raynes asked.

"Looks like it's going okay to me," the nurse said. "I'm not a doctor, though." WEATHER STEPPED inside the OR and said, "Gabriel?"

Maret looked up from the operating table and said, "Ah, Weather, come around here."

She walked carefully around the edge of the working crew, and Maret pointed at the babies' skulls. "The seven vein," he said, and she nodded.

The seven vein had been difficult to image, but they didn't know why, exactly. It rose close to the edge of the defect, up out of Sara's brain, before apparently edging over to a trough where it dumped the blood.