"Well, you're going to cool your heels. I'm going to review the case file."

"But--"

"Relax, Wallace. Investigations take time. Sit back, take your jacket off. Enjoy our wonderful coffee."

Wallace glanced at the closet that served as the police station's canteen. He rolled his eyes and the ominous tone of earlier was replaced with a laugh. "Funny. I didn't know they still made instant."

The detective winked and ambled down the hall on his aching bones.

Quentin Altman hadn't run the Greenville Strangler case himself. He'd worked on it some-the whole department had had a piece of the case-but the officer in charge had been Bob Fletcher, a sergeant who'd been on the force for years. Fletcher, who'd never remarried after his wife left him some years before and was childless, had devoted his life to his job after the divorce and seemed to take his inability to solve the strangler case hard; the soft-spoken man had actually given up a senior spot in Homicide and transferred to Robbery. Altman was now glad, for the sergeant's sake, that there was a chance to nail the killer who'd eluded him.

Altman wandered down to Robbery with the news about the book and to see if Fletcher knew anything about it. The sergeant, though, was out in the field at the moment and so Altman left him a message and then dove into the cluttered and oppressively hot records room. He found the strangler files easily; the folders sported red stripes on the side, a harsh reminder that, while this might've been a cold case, it was still very much open.

Returning to his office, he sat back, sipping the, yes, disgusting instant coffee, and read the file, trying to ignore Wallace's incessant scribbling on his steno pad, the scratchy noise irritatingly audible across the office. The events of the murders were well documented. The perp had broken into two women's apartments and strangled them. There'd been no rape, sexual molestation, or postmortem mutilation. Neither woman had ever been stalked or threatened by former boyfriends, and though Kimberly had recently purchased some condoms, none of her friends knew that she'd been dating. The other victim, Becky Winthrop, her family said, hadn't dated for over a year.

Sergeant Fletcher had carried out a by-the-book investigation, but most killings of this sort, without witnesses, motive, or significant trace found at the scene, are not solved without the help of an informant-often a friend or acquaintance of the perp. But, despite extensive press coverage of the investigation and pleas on TV by the mayor and Fletcher, no one had come forward with any information about possible suspects.

An hour later, just as he closed the useless file, Altman's phone rang. A forensic lab tech at the county police told him that they had been through the book page by page and found three passages underlined and starred with large asterisks. In addition to the two that Wallace had found, there was a passage about how the killer had put plastic bags around his shoes to prevent leaving footprints and to keep trace evidence from sloughing off at the crime scene.

Altman gave a short laugh. The report that he'd just read contained a note that the crime-scene searchers hadn't been able to figure out why the perp had left no footprints.

Because the goddamn killer had used a goddamn how-to book, the detective thought bitterly.

The tech continued: Next to two of the underscored passages were several handwritten notations. One said, "Check this one out. Important." And the other: "Used distraction-brilliant."

The documents department had blown up images of the handwriting and was prepared to compare these to any samples found elsewhere, though until such samples were found they could do nothing more.

The techs had also checked for any impression evidence-to see if the killer had written something on, say, a Post-It note on top of one of the pages-but found nothing.

Aninhydrin analysis revealed a total of nearly two hundred latent fingerprints on the three pages on which the paragraphs had been underlined. Unfortunately, many of them were old and were only fragments. Technicians had located a few that were clear enough to be identified and had run them through the FBI's automatic fingerprint identification system in West Virginia. But all the results had come back negative.

The cover of the book, wrapped in print-friendly cellophane, yielded close to four hundred prints, but they, too, were mostly smudges and fragments. AFIS had provided no positive IDs for these, either.

Frustrated, Altman thanked the technician as cordially as he could and hung up.

"So what was that about?" Wallace asked, looking eagerly at the sheet of paper in front of Altman, which contained both notes on the conversation he'd just had and a series of compulsive doodles.

He explained to the reporter about the forensic results.

"So, no leads," Wallace summarized dramatically and jotted a note, the irritated detective wondering why the reporter had actually found it necessary to write this observation down.

As he gazed at the reporter an idea occurred to Altman and he stood up abruptly. "Let's go."

"Where?"

"Your crime scene."

"Mine?" Wallace asked, scrambling to follow the detective as he strode out the door.

The library near Gordon Wallace's apartment, where he'd checked out the novel, was a small branch in the Three Pines neighborhood of Greenville, so named because legend had it that three trees in a park here had miraculously survived the fire of 1829, which had destroyed the rest of the town. It was a nice place, populated mostly by businessmen, professionals, and educators; the college was nearby (the same school where the first strangler victim had been a student).

Altman followed Wallace inside and the reporter found the head of the branch and introduced her to the detective. Mrs. McGiver was a trim woman dressed in stylish gray; she looked more like a senior executive with a high-tech company than a librarian.

The detective explained the connection between the person who'd checked out the book and the murders, shock registering on the woman's face as she realized that the killer was somebody who'd been to her library. Perhaps even someone she knew.

"I'd like a list of everybody who checked out that book." Altman had considered the possibility that the killer might not have checked it out but had looked through it here, in the library itself. But that meant he'd have to underline the passages in public and risk drawing the attention of librarians or patrons. He concluded that the only safe way for the strangler to do his homework was at home.

"I'll see what I can find," she said.

Altman had thought that it might take days to pull together this information, but Mrs. McGiver was back in minutes. Altman felt his gut churning with excitement as he gazed at the sheets of paper in her hand, relishing the sensations of the thrill of the hunt and pleasure at finding a fruitful lead.

But as he flipped through the sheets, he frowned. Every one of the thirty or so people checking outTwo Deaths had done so recently-within the last six months. They needed the names of those who'd checked it out before the killings a year ago.

"Actually, I need to see the list before July tenth of last year," he explained.

"Oh, but we don't have records that far back. Normally we would, but about six months ago our computer was vandalized." "Vandalized?"

She nodded, frowning. "Somebody poured battery acid or something into the hard drive. Ruined it and destroyed all our records. Backup, too. Somebody from your department handled the case. I don't remember who."

Wallace said, "I didn't hear about it."

"They never found who did it. It was very troubling, but more of an inconvenience than anything. Imagine if he'd decided to destroy the books themselves."