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“He’s searching the natural history museum. Polk’s trail led there.”

“Hopefully he’ll find something, but that was also why I patched a call to you. I may have discovered more bread crumbs to follow.”

Curious, Painter sank into the chair. Malcolm rotated his computer’s flat-screen monitor to a better angle for Painter to view.

“What did you find?” Painter asked.

“Something curious. I don’t know really what to make of it, but it might give us someplace to continue the investigation. Knowing the victim was suffering from radiation poisoning, I sought some clue to the source. Initial examination of Polk’s gastrointestinal tract and liver showed he didn’t ingest anything radiological in nature.”

“So no dinner poisoned with polonium-210 or the like?”

Malcolm nodded. “From the degree of radiodermatitis burns to his skin, I was fairly certain the radiation came from an environmental source. He must have been in some type of hot zone. Microanalysis of his hair showed the exposure was acute in nature. He’d been poisoned less than a week ago.”

“But where—?”

Malcolm held up a hand for patience and used his other to tap at his keyboard and bring up a map of the world on the monitor. “Trace amounts of radioactive debris were caught in the deep alveolar pockets in his lungs. Like coal dust in a miner’s lung. I ran the sample through a mass spectrograph and was able to determine a rough breakdown of the isotope content.”

He pointed to his screen. The left side of the computer monitor began to scroll with data. “Such information is often as unique as a fingerprint. It just took tapping into IAEA database in Vienna.”

Painter noted that the open search window had the organization’s name stenciled at the top: INTERNATIONAL ATOMIC ENERGY AGENCY.

“The agency monitors hot spots around the world: mines, reactors, industrial sources. Despite what some might think, not all radiation is the same. We’re talking about material that is constantly decaying, whose isotope content varies, depending on where it might have been mined and how it was processed. The end result is radiation signatures unique to each use-site.”

“And the debris in the professor’s lungs?”

“I ran a search through the IAEA database and got a hit.”

“You know where Polk was exposed?”

He nodded to the screen as the scrolling stopped and the world map blew up, zooming into one location in central Russia. A name appeared in a highlighted box, a name synonymous with radiological disaster.

CHERNOBYL

What was Archibald Polk doing at Chernobyl? How had he been exposed to such a lethal level of radiation from the dead reactor site? The reactor was due this week to be sealed with a new Sarcophagus, a massive articulated steel dome. Amid all the new construction, had Polk somehow been exposed to a lethal dose of radiation there?

Before Painter could question Malcolm in more depth, his cell phone vibrated on his belt. He unhooked it and checked who was calling. It was his assistant. Frowning, he flipped it open.

“What is it, Brant?”

“Director, I received an alert from Homeland. There’s just been a bomb threat called in to the natural history museum.”

Painter’s fingers tightened on his cell phone.

The natural history museum…where Gray had been headed.

That couldn’t be good.

“Patch me through to Gray’s radio.”

He waited, cell phone at his ear. Malcolm stared over at him.

Had Gray called in the threat? Had someone else?

Either way, something was wrong.

He had confirmation a second later.

Brant came back on the line. “Sir, he’s not responding.”

7:56 P.M.

Elizabeth Polk appraised Gray Pierce as they neared the museum’s loading docks. Studying him askance, she noted the faded bruising on one side of his face. His sunburned complexion hid most of the contusions. The beating must have taken place a month or so ago. It gave the planes of his face a look of hammered copper and brought out the blue of his eyes. It was those same eyes that chilled her when he spotted the half dozen men clearing the museum’s loading dock and turned them back.

“Something’s not right here,” he said.

She caught a glimpse of the warehouse space past his shoulder. Lit by flickering fluorescents, the cavernous space was crowded with tall shelves stacked with cleaning supplies and dry goods for the various museum concession stores. A single forklift rested beside a series of pulleys and counterbalances for bringing in larger pieces of an exhibit. A steel roll-up door stood open to the right. Outlined against the waning daylight, a cadre of men in black riot gear had set up a cordon near the exit. Under the klaxon of the evacuation alarm, they were searching each worker and staff member who sought to exit in that direction.

A narrow-shouldered man in a blue suit oversaw it from a few steps away. He was plainly someone high up the food chain.

Gray forced her back down the hallway. He hefted his shoulder bag higher. It bore the museum logo and carried the strange skull her father had hidden in the museum’s storage room. At the thought of her father, a dull ache in her chest threatened to melt into sobbing tears. She held it back. She would address her loss at a quieter moment.

Down the hall, in the opposite direction of the docks, a shout echoed out the stairwell ahead, a call to search every room. Boots pounded down the stairs.

Gray stopped and turned to her. “Is there another way out of here?”

She nodded. “The service tunnels. Over this way.”

As she led them back again, Gray fixed her with those stormy eyes, questioning her knowledge.

“Some of the staff take their smoking breaks down there.” She glanced to him guiltily. She really needed to quit. Still, the habit had allowed her to bond with a few of the other researchers. A secret smokers’ club. And all it cost was the risk of emphysema and lung cancer. “We’re not supposed to smoke within the museum, of course. Fire danger, but it’s all stone and steam pipes down there.”

She led them to an unmarked door and keyed open the electronic lock with her card. The stairs on the far side were stained cement with a steel railing along one side. It led down in sharp turns.

Before they could enter, a low growl drew all their eyes back to the docks. A low shape slunk into view of the hallway. Thirty yards away. A German shepherd. It was outfitted with a black vest and was tethered to a man still out of view.

Elizabeth froze.

The dog spotted them and lunged forward, straining against his leash.


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