We left the car at the site and walked round to the estate by the road (I still remembered, somewhere in my muscles, going over the wall: where the foothold was, the scrape of the concrete on my kneecap, the jar of landing). Cassie demanded to go to the shop on the way; it was well past two o'clock and we might not have another chance at lunch for a while. Cassie eats like a teenage boy and hates missing meals, which normally I enjoy-women who live on weighed portions of salad annoy me-but I wanted to get today over with as quickly as possible.

I waited outside the shop, smoking, but Cassie came out with two sandwiches in plastic cartons and handed one to me. "Here."

"I'm not hungry."

"Eat the damn sandwich, Ryan. I'm not carrying you home if you faint." I have in fact never fainted in my life, but I do tend to forget to eat until I start getting irritable or spacy.

"I said I'm not hungry," I said, hearing the whine in my voice, but I opened the sandwich anyway: Cassie had a point, it was likely to be a very long day. We sat on the curb, and she pulled a bottle of lemon Coke out of her satchel. The sandwich was officially chicken and stuffing, but it tasted mainly of plastic wrapper, and the Coke was warm and too sweet. I felt slightly sick.

I don't want to give the impression that my life was blighted by what happened at Knocknaree, that I drifted through twenty years as some kind of tragic figure with a haunted past, smiling sadly at the world from behind a bittersweet veil of cigarette smoke and memories. Knocknaree didn't leave me with night terrors or impotence or a pathological fear of trees or any of the other good stuff that, in a made-for-TV movie, would have led me to a therapist and redemption and a more communicative relationship with my supportive but frustrated wife. To be honest, I could go for months on end without ever thinking about it. Occasionally some newspaper or other would run a feature on missing people and there they would be, Peter and Jamie, smiling from the cover of a Sunday supplement in grainy photographs made premonitory by hindsight and overuse, between vanished tourists and runaway housewives and all the mythic, murmuring ranks of Ireland's lost. I'd see the article and notice, detachedly, that my hands were shaking and it was hard to breathe, but this was purely a physical reflex and only lasted a few minutes anyway.

I suppose the whole thing must have had its effects on me, but it would be impossible-and, to my mind, pointless-to figure out exactly what they were. I was twelve, after all, an age at which kids are bewildered and amorphous, transforming overnight, no matter how stable their lives are; and a few weeks later I went to boarding school, which shaped and scarred me in far more dramatic, obvious ways. It would feel naïve and basically cheesy to unweave my personality, hold up a strand and squeal: Golly, look, this one's from Knocknaree! But here it was again, all of a sudden, resurfacing smugly and immovably in the middle of my life, and I had absolutely no idea what to do with it.

"That poor kid," Cassie said suddenly, out of nowhere. "That poor, poor little kid."

The Devlins' house was a flat-fronted semi-d with a patch of grass in front, exactly like all the others on the estate. All of the neighbors had made frantic little declarations of individuality via ferociously trimmed shrubs or geraniums or something, but the Devlins just mowed their lawn and left it at that, which in itself argued a certain level of originality. They lived halfway up the estate, five or six streets from the site; far enough that they had missed the uniforms, the techs, the morgue van, all the terrible, efficient bustle that in one glance would have told them everything they needed to know.

When Cassie rang the bell, a man about forty answered. He was a few inches shorter than me, starting to thicken around the middle, with neatly clipped dark hair and big bags under his eyes. He was wearing a cardigan and khaki trousers and holding a bowl of cornflakes, and I wanted to tell him that this was all right, because I already knew what he would learn over the next few months: this is the kind of thing people remember in agony all their lives, that they were eating cornflakes when the police came to tell them their daughter was dead. I once saw a woman break down on the witness stand, sobbing so hard they had to call a recess and give her a sedative shot, because when her boyfriend was stabbed she was at a yoga class.

"Mr. Devlin?" Cassie said. "I'm Detective Maddox, and this is Detective Ryan."

His eyes widened. "From Missing Persons?" There was mud on his shoes, and the hems of his trousers were wet. He must have been out looking for his daughter, somewhere in the wrong fields, come in to get something to eat before he tried again and again.

"Not exactly," Cassie said gently. I mostly leave these conversations to her, not just out of cowardice but because we both know she is much better at it. "May we come in?"

He stared at the bowl, put it down clumsily on the hall table. A little milk slopped onto sets of keys and a child's pink cap. "What do you mean?" he demanded; fear put an aggressive edge on his voice. "Have you found Katy?"

I heard a tiny sound and looked over his shoulder. A girl was standing at the foot of the stairs, holding on to the banister with both hands. The interior of the house was dim even in the sunny afternoon, but I saw her face, and it transfixed me with a bright shard of something like terror. For an unimaginable, swirling moment I knew I was seeing a ghost. It was our victim; it was the dead little girl on the stone table. I heard a roaring noise in my ears.

A split second later, of course, the world righted itself, the roaring subsided and I realized what I was seeing. We wouldn't be needing the ID shot. Cassie had seen her as well. "We're not sure yet," she said. "Mr. Devlin, is this Katy's sister?"

"Jessica," he said hoarsely. The little girl edged forward; without taking his eyes from Cassie's face, Devlin reached back, caught her shoulder and pulled her into the doorway. "They're twins," he said. "Identical. Is this-Have you-Did you find a girl who looks like this?" Jessica stared somewhere between me and Cassie. Her arms hung limply by her sides, hands invisible under an oversized gray sweater.

"Please, Mr. Devlin," Cassie said. "We need to come in and speak with you and your wife in private." She flicked a glance at Jessica. Devlin looked down, saw his hand on her shoulder and moved it away, startled. It stayed frozen in midair, as if he had forgotten what to do with it.

He knew, by that point; of course he knew. If she had been found alive, we would have said so. But he moved back from the door automatically and made a vague gesture to one side, and we went into the sitting room. I heard Devlin say, "Go back upstairs to your Auntie Vera." Then he followed us in and closed the door.

The terrible thing about the sitting room was how normal it was, how straight out of some satire on suburbia. Lace curtains, a flowery four-piece suite with those little covers on the arms and headrests, a collection of ornate teapots on top of a sideboard, everything polished and dusted to an immaculate shine: it seemed-victims' homes and even crime scenes almost always do-far too banal for this level of tragedy. The woman sitting in an armchair matched the room: heavy in a solid shapeless way, with a helmet of permed hair and big, drooping blue eyes. There were deep lines from her nose to her mouth.

"Margaret," Devlin said. "They're detectives." His voice was taut as a guitar string, but he didn't go to her; he stayed by the sofa, fists clenched in the pockets of his cardigan. "What is it?" he demanded.