He said, "You have to understand him, Kay."

"Well, I don't."

"He's a good detective, a very fine one."

I didn't comment.

We sat silently.

My anger began to rise. I knew better, but there was no stopping the words from boiling out. "Damn it, Benton! These women deserve our best effort. We screw it up and someone else may die. I don't want him screwing it up because he's got some problem!"

"He won't."

"He already is."

I lowered my voice. "He's got a noose around Matt Petersen's neck. It means he's not looking at anybody else."

Marino, thank God, was taking his sweet time coming back. Wesley's jaw muscles were flexing and he wouldn't meet my eyes. "I haven't dismissed Petersen yet either. I can't. I know killing his wife doesn't fit with the other three. But he's an unusual case. Take Gacy. We've got no idea how many people he murdered. Thirty-three kids. Possibly it was hundreds. Strangers, all of them strangers to him. Then he does his mother and stuffs pieces of her down the garbage disposal… " I couldn't believe it. He was giving me one of his "young agents" lectures, rattling on like a sweaty-palmed sixteen year-old on his first date. "Chapman's toting around Catcher in the Rye when he wastes John Lennon. Reagan, Brady get shot by some jerk who's obsessed with an actress. Patterns. We try to predict. But we can't always. It isn't always predictable."

Next he began reciting statistics. Twelve years ago the clearance rate for homicides averaged at ninety-five, ninety-six percent.

Now it was more like seventy-four percent, and dropping. There were more stranger killings as opposed to crimes of passion, and so on. I was barely hearing a word of it.

"… Matt Petersen worries me, to tell you the truth; Kay." He paused.

He had my attention.

"He's an artist. Psychopaths are the Rembrandts of murderers. He's an actor. We don't know what roles he's played out in his fantasies. We don't know that he isn't making them reality now. We don't know that he isn't diabolically clever. His wife's murder might have been utilitarian."

"Utilitarian?"

I stared at him with wide, disbelieving eyes, stared at the photographs taken of Lori Petersen at the scene. Her face a suffused mask of agony, her legs bent, the electrical cord as taut as a bowstring in back and wrenching her arms up and cutting into her neck. I was seeing everything the monster did to her. Utilitarian? I wasn't hearing this.

Wesley explained, "Utilitarian in the sense he may have had a need to get rid of her, Kay. If, for example, something happened to make her suspect he'd killed the first three women, he may have panicked, decided he had to kill her. How can he do that and get away with it? He can make her death look like the other ones."

"I've heard shades of this before," I said evenly. "From your partner."

His words were slow and steady like the beat of a metronome, "All possible scenarios, Kay. We have to consider them."

"Of course we do. And that's fine as long as Marino considers all possible scenarios and doesn't wear blinders because he's getting obsessed or has a problem."

Wesley glanced toward the open door. Almost inaudibly, he said, "Pete's got his prejudices. I won't deny that."

"I think you'd better tell me exactly what they are."

"Let it suffice to say that when the Bureau decided he was a good candidate for a VICAP team, we did some checking into his background. I know where he grew up, how he grew up. Some things you never get over. They set you off. It happens."

He wasn't telling me anything I hadn't already figured out. Marino grew up poor on the wrong side of the tracks. He was uncomfortable around the sort of people who had always made him uncomfortable. The cheerleaders and homecoming queens never gave him a second glance because he was a social misfit, because his father had dirt under his nails, because he was "common."

I'd heard these cop sob stories a thousand times before. The guy's only advantage in life is he's big and white, so he makes himself bigger and whiter by carrying a gun and a badge.

"We don't get to excuse ourselves, Benton," I said shortly. "We don't excuse criminals because they had screwed-up childhoods. We don't get to use the powers entrusted to us to punish people who remind us of our own screwed-up childhoods."

I wasn't lacking in compassion. I understood exactly where Marino was coming from. I was no stranger to his anger. I'd felt it many times when facing a defendant in court. No matter how convincing the evidence, if the guy's nicelooking, clean-cut and dressed in a two-hundred-dollar suit, twelve working men and women don't, in their hearts, believe he's guilty.

I could believe just about anything of anybody these days. But only if the evidence was there. Was Marino looking at the evidence? Was he even looking at all? Wesley pushed back his chair and stood up to stretch. "Pete has his spells. You get used to it. I've known him for years."

He stepped into the open doorway and looked up and down the hall. "Where the hell is he, anyway? He fall in the john?"

Wesley concluded his depressing business with my office and disappeared into the sunny afternoon of the living where other felonious activities demanded his attention and his time.

We'd given up on Marino. I had no idea where he'd gone, but his trip to the men's room apparently took him out of the building. Nor did I have a chance to wonder about it for very long, because Rose came through the doorway linking my office with hers just as I was locking the case files back inside my desk.

I knew instantly by her weighty pause and the grim set of her mouth that she had something on her mind I didn't want to hear.

"Dr. Scarpetta, Margaret's been looking for you and asked me to tell you the minute you came out of your meeting."

My impatience showed before I could check it. There were autopsies to look in on downstairs and innumerable phone calls to return. I had enough to do to keep half a dozen people busy and I wanted nothing else added to the list.

Handing me a stack of letters to be signed, she looked like a formidable headmistress as she peered at me over her reading glasses and added, "She's in her office, and I don't think the matter can wait."

Rose wasn't going to tell me, and though I really couldn't fault her, I was annoyed. I think she knew everything that went on throughout the entire statewide system, but it was her style to direct me to the source instead of filling me in directly. In a word, she assiduously avoided being the bearer of bad news. I suppose she'd learned the hard way after working for my predecessor Cagney most of her life.

Margaret's office was midway down the hall, a small Spartan room of cinder-block walls painted the same insipid creme-de-menthe color as the rest of the building. The dark green tile floor always looked dusty no matter how often it was swept, and spilling over her desktop and every other surface were reams of computer printouts. The bookcase was crammed with instruction manuals and printer cables, extra ribbons and boxes of diskettes. There were no personal touches, no photographs, posters or knickknacks. I don't know how Margaret lived with the sterile mess, but I'd never seen a computer analyst's office that wasn't.

She had her back to the door and was staring at the monitor, a programmer manual opened in her lap. Swiveling around, she rolled the chair to one side when I came in. Her face was tense, her short black hair ruffled as if she'd been raking her fingers through it, her dark eyes distracted.