The next few minutes are shreds of nightmare spliced together with great blank patches. I know I ran, slid on fallen glass and kept running, trying to get to Daniel. I know Abby, crouched over him, fought like a cat to keep me off, wild-eyed, clawing. I remember blood smeared down her T-shirt, the boom echoing through the house as someone broke the front door open, men’s voices shouting, feet pounding. Hands under my arms, pulling me back; I twisted and kicked till they gave me a hard shake and my eyes cleared and I recognized Frank’s face close to mine, Cassie it’s me stop relax it’s over. Sam shoving him away, his hands rough with panic all over me, checking for bullet holes, fingers coming away bloody Is that yours is that yours? I didn’t know. Sam turning me, grabbing at me, his voice finally sagging with relief: You’re grand, you’re OK, he missed… Someone said something about the window. Someone sobbing. Too much light, colors so bright you could cut yourself, too many voices, ambulance, get an-

Finally someone steered me out front and into a marked car, slammed the door. I sat there for a long time, looking at the cherry trees, at the quiet sky slowly dimming, at the distant dark curves of the hills. I didn’t think about anything at all.

There are procedures for this, for officer-involved shootings. There are procedures for everything, in the force, going carefully unmentioned till the day they’re needed at last and the keeper turns the rusty key, blows dust off the file. I had never met a cop who had shot anyone. There was no one who could have told me what to expect, or how to do this, or that it was all going to be OK.

Byrne and Doherty got stuck taking me to headquarters, in Phoenix Park, where Internal Affairs work in showroom offices and a thick puffy cloud of defensiveness. Byrne drove; the slump of his shoulders said, clear as a voice balloon coming out of his head, I knew something like this would happen. I sat in the back like a suspect and Doherty tried to be surreptitious about watching me in the rearview mirror. He was practically drooling: this was probably the most exciting thing that had ever happened to him, plus gossip is good currency in our world and he had just won the lottery. My legs were so cold I could barely move them; I was cold right down to my bones, as if I’d fallen into a freezing lake. At every traffic light Byrne stalled the car and swore morosely.

Everyone hates IA-the Rat Squad, people call them, the quislings, various other less flattering things-but they were good to me, that day at least. They were detached and professional and very gentle, like nurses going through their expert rituals around some patient who had been in a terrible, disfiguring accident. They took my badge-“for the duration of the investigation,” someone said soothingly; it felt like they had shaved my head. They peeled off the bandage and unclipped the mike. They took my gun like evidence, which of course it was, careful latex fingers dropping it into an evidence bag, sealing it, labeling it with neat marker strokes. A Bureau tech with her hair in a smooth brown bun like a Victorian maid’s stuck a needle in my arm, deftly, and took a blood sample to test for alcohol and drugs; I remembered, vaguely, Rafe pouring and the smooth cool of the glass, but I couldn’t remember taking even one sip, and I thought this had to be a good thing. She swabbed my hands for gunshot residue and I noticed, as if I were watching someone else from a long way away, that my hands weren’t shaking, they were rock steady, and that a month of Whitethorn House cooking had softened the hollows by my wrist bones. “There,” the tech said comfortingly, “quick and painless,” but I was busy staring at my hands and it wasn’t till hours later, when I was sitting on a neutral-colored lobby sofa under innocuous art waiting for someone to come take me somewhere else, that I realized where I’d heard that tone before: out of my own mouth. Not to victims, not to families; to the others. To men who’d left their wives half blinded, to women who’d scalded their toddlers with boiling water, to killers, in the light-headed disbelieving moments after everything came pouring out, I had said in that infinitely gentle voice, It’s OK, you’re OK. Breathe. The worst part’s over.

Outside the lab window the sky had gone black, a tainted rusty black smeared orange with city lights, and there was a thin breakable moon riding low among the treetops in the park. A shiver rocked my spine like a long cold wind. Cop cars speeding through Glenskehy and then away again, John Naylor’s eyes pure with rage, and night coming down hard.

I wasn’t supposed to talk to Sam or Frank, not till all of us had been interviewed. I told the tech I had to go to the bathroom and gave her a woman-to-woman look to explain why I was taking my jacket with me. In the cubicle I flushed the jacks and while the water was still running-everything about IA makes you paranoid, the thick carpets, the hush-I texted Frank and Sam, fast. Someone NEEDS to keep an eye on the house.

I set my phone to silent and sat on the toilet lid, smelling sick fake-flower air freshener and waiting, for as long as I could get away with, but neither of them answered. Their phones were probably off; they would be doing furious full-on interviewing of their own, expertly juggling Abby and Rafe and Justin between them, having quick undertone conferences in corridors, asking questions over and over again with relentless, ferocious patience. Maybe-my heart flipped upwards, punched at the base of my throat-maybe one of them was at the hospital, talking to Daniel. White face, IV lines, people in scrubs moving fast. I tried to remember exactly where the bullet had hit him, ran through it over and over in my head, but the film blinked and stuttered and I couldn’t see. That tiny nod; the leap of his gun barrel; recoil slamming up my arms; those grave gray eyes, pupils only a little dilated. Then there was just Abby’s voice flat and adamant No; the blank wall where Daniel had been standing, and silence, huge and roaring in my ears.

The tech handed me back to the IA guys and they told me that if I was feeling a little shaken up I could wait till the next day to give my statement, but I said no, thanks, I was fine. They explained to me that I had the right to have a lawyer or a union rep present and I said no, thanks, I was fine. Their interview room was smaller than ours, barely room to push your chair back from the table, and cleaner: no graffiti, no cigarette burns in the carpet, no gouges in the walls where someone had gone alpha gorilla with a chair. Both of the IA guys looked like cartoon accountants: gray suits, bald spots, no lips, matching rimless glasses. One of them leaned against the wall behind my shoulder-even if you know all the tactics inside out, they still work on you-and the other one sat across from me. He adjusted his notebook fussily so that it lined up with the edge of the table, turned on his tape recorder and did the preliminary spiel. “Now,” he said. “In your own words, Detective.”

“Daniel March,” I said; they were the only words that would come out. “Is he going to be all right?” and I knew even before he told me, I knew when his eyelids flickered and his eyes slid away from mine.

The Bureau tech-her name was Gillian-drove me home sometime late that night, when the IA twins had finished taking my statement. I told them what you’d expect: the truth, as well as I could put it into words, nothing but the truth, not the whole truth. No, I didn’t feel that I’d had any option except to fire my weapon. No, I had had no opportunity to attempt a nonlethal disabling shot. Yes, I had believed my life was in danger. No, there had been no prior indication that Daniel was dangerous. No, he hadn’t been our prime suspect, long list of reasons why not-it took me a second to remember them, they felt so long ago and far away, part of a different life. No, I didn’t believe it had been remiss of me or Frank or Sam to leave a gun in the house, it was standard undercover practice to leave illegal materials in place for the duration of the investigation, we had had no way to remove it without blowing the whole operation. Yes, in retrospect that decision did appear to have been unwise. They told me we’d talk again soon-they made it sound like a threat-and set up an appointment for me with the shrink, who was going to just about wet his polyester blend over this one.