Artie tried to think of someone to share the news with. Someone who would appreciate the brilliance of his puzzle-solving skills. He’d been able to answer a question that cold-case sleuths and law-enforcement officials across the States hadn’t been able to figure out for twenty-five years. It was as big as unveiling Ted Kaczynski as the Unabomber.

Almost as if his wish was being granted, he heard a door close. Not a slam. Just a soft tap.

It was probably nothing. Could have been his imagination. No one was around down here on the weekends.

He started flipping through his pages again, jotting down notes in the margins of his notebook.

Footsteps down the hall. He was certain.

Crap!

He stood frozen in place, eyes darting around him. The light switch. He needed to flip the fucking light switch.

Too late.

The footsteps were closing in. Right outside the door now.

He twisted around, looking for something to use as a weapon, and grabbed the closest thing he could find. A syringe. He pulled off the plastic needle guard just as he heard a key card slide into the door’s security lock.

“What the hell are you doing here tonight?”

Artie let out a sigh of relief that almost included, speak of the devil. “You scared the crap out of me,” he said instead.

“Don’t you realize you can see the light on underneath this door from the hallway?”

“Nobody’s around,” Artie defended himself. “It was your idea that I use the lab on the weekend.”

“I thought you were supposed to make the delivery yesterday.”

“I did,” Artie said, slipping the syringe into his pocket and trying to nonchalantly stack his paperbacks onto the incriminating pages of his notebook and the articles beneath it. “I went to Connecticut yesterday. Mailed them from there.”

“Them?”

Damn! This probably wasn’t the time to reveal his contribution.

“I meant the package. I mailed it yesterday.”

“So what are you doing here tonight?” His eyes darted around the countertops.

“I was just dropping off some stuff. You know, the DNA samples that I collect.”

Artie watched him look around the room and settle on the paperback of the Unabomber. He picked it up.

“How many times do I have to tell you not to carry these around in your backpack?”

He tossed it onto Artie’s pile and the books and articles shifted. Artie watched his eyes and held his breath, but he knew he was seeing exactly what Artie didn’t want him to see. He pulled one of the Tylenol articles out of the stack.

“What are you doing?”

“Just researching?”

He didn’t buy it. Artie needed to think fast. Then suddenly he relaxed. What was he worried about? They were the same. Artie knew that. Not just teacher and student. Kindred spirits.

“I figured it out,” Artie told him.

He didn’t respond. Just cocked an eyebrow and waited for Artie to explain.

“You’re brilliant,” Artie said, and he meant it. “The Tylenol murders. That was you. They always wondered if someone had done seven random murders just to cover up the one they really wanted to get away with.”

Still no response. Artie took that as a good sign.

He continued, “And by planting seven bottles in the Chicago area everyone believed your real target, which was in Terre Haute, had to be, like, some kind of fluke.”

There was no smile, but Artie reminded himself that he wasn’t really a smiler. That he no longer looked angry was good. He was rubbing a hand over his jaw, but waiting and listening.

“That’s what you’re doing now, too. Right? Mailing out a bunch of random packages with the virus so it looks like the work of some homegrown terrorist. All the while you have one target in mind. Right?” He glanced at his notebook, still opened to the list. “So who is it? Who’s the real target?”

“You think you’re pretty smart,” he told Artie. “But there’re all real targets. I’m taking care of every son of a bitch who’s screwed me over the years.”

Then he did something Artie should have known was a ruse. He smiled. “How did you figure out the Tylenol thing? I mean with Indiana? Something in here?”

He pointed to the stack and Artie grinned. He bent over and started to sort through the mess. He didn’t even see the microscope come crashing down onto his head.

Artie fit perfectly right on top of the dead monkey. He was unconscious when the freezer lid slammed shut and the padlock clicked back into place.