Rose was standing at one of the file cabinets that ringed her office, paging through folders stuffed into the drawers like too many clowns in a Volkswagen. “I’m trying to find the last few op-ed pieces theTimes published on ‘quality of life’ crimes in the city. Paul’s trying to convince them to run a series on our success rate with neighborhood cleanups of marijuana dealers and prostitutes.”

She smiled at me over the sheaf of yellowing papers she was examining and that was my first sign that the D.A. was in a good mood. Rose was my personal early warning system.

“He’ll be right out with you, Alex. He’s just on the phone with his wife.”

I busied myself reviewing the few facts I had learned during my stop at the hospital, knowing that Battaglia was a stickler for detail and bound to want more information than I had here.

His voice boomed out at Rose from within his huge office. “Have you got Cooper yet?”

I answered the question by turning the corner and showing myself to him as he waved me in with the two fingers of his left hand that secured the ever-present cigar.

“If you know what’s good for my domestic tranquillity, you’ll tell your pals in Homicide to solve this one fast. My wife’s running the Mid-Manhattan fundraiser-the spring gala-and the tickets were supposed to go on sale in two weeks. The caterer from the goddamn Plaza called her at eight-thirty this morning when he heard the news asking for a check today to guarantee five hundredsaumon en croûte dinners in case the committee loses supporters over this. So much for the late good doctor. Is it yours?”

“I’d like it to be, Paul. It’s a rape-homicide and I’ve-”

He cut me off, not needing to hear things he already knew. “I take it you’ve been up at the crime scene already?”

“Lieutenant Peterson let Chapman bring me in on it. I stopped by for an update and then came down here to start checking M.O.s and parolees for similarities. I don’t think there’s a hospital in Manhattan where we haven’t had some kind of criminal problem in the past, so there’s a lot to look at.”

Battaglia puffed on the cigar, lifted one foot against the edge of his desk, and pushed back, letting his chair rest on its rear two legs. He stared directly at my face, eyeballing me to make me answer his questions without evasion.

“It’s a perfect assignment for you, Alexandra, if you’re up to it. Even though you got it through the back door. Nobody knows more about sex crimes than you, and I doubt the media glare, which I expect will be pretty intense, will bother you much.”

He left off the phrase “after the last time” but I met his gaze and returned it, telling him that I was looking forward to getting to work with the Squad.

“You’ll report straight to me on this one. And if Chapman gets any of his creative ideas, like dressing you up in a nurse’s uniform and having you work the midnight shift to try to gather intelligence, you’d make me very happy if you resist the urge.”

I laughed and assured Battaglia that I wouldn’t dream of doing anything like that, while making a mental note to suggest to the team that we consider admitting Maureen Forester, my favorite decoy detective, to the neurological floor of Mid-Manhattan Hospital as a patient-for observation.

THE REST OF THE DAY PASSED QUICKLY AS I fielded the usual range of problems and inquiries from the young lawyers who worked with me in the unit. Sarah and I had spent the lunch hour in a conference room, eating salad and sipping Diet Coke, while we made lists of defendants and suspects who might warrant a close look during the Dogen murder investigation. Laura shielded me from all the nonessential phone calls, and I spent the last part of the day sorting through messages and returning those that could not wait until the next morning.

At six-thirty I shut off the lights, went down the hallway to tell the Chief of the Trial Division, Rod Squires, that I was on my way to the task force meeting, and left the building with my folder of case summaries to walk to the Jeep. I had missed most of the rush hour traffic so I sailed up First Avenue with no trouble, using the time to call my best friend, Nina Baum, and leave a voice mail recording on her office system at her law firm in Los Angeles, as I did almost every day.

I parked near the station house on East Fifty-first Street and entered the building, explaining the purpose of my visit and showing my identification to the cop at the desk, who nodded in response and pointed me in the direction of the staircase. I climbed the flight and as I pushed against the bar on the heavy metal door, it swung open onto the green-tiled hallway of the second floor. The locker rooms for the uniformed cops were to my right, the anticrime office straight ahead, but most of the working space on the floor was consumed by the detective squad room off to my left.

Walking into the headquarters of a breaking major homicide investigation was, as always, a chance to see the cream of the NYPD at its best. The energy level was electric as Peterson’s hand-chosen task force gathered and prepared for the briefing that would begin after the arrival of the big bosses within the hour. I glanced around the room to see who would be working the case with me, subconsciously rating them not only as investigators but as trial witnesses and testifiers. Whatever skills they brought to this part of the process would be compromised or enhanced by the quality of their paperwork and their ability to account for details like preserving the chain of custody and the proper methods of gathering minute traces of evidence, carefully accumulating clues, or sloppily overlooking significant leads.

The squad area was like a rabbit warren as I viewed it from within the doorway. More than twenty detectives were clustered around the twelve desks that filled one side of the room. On each desk stood a standard manual typewriter, a couple of telephones, a wire basket-empty now but about to begin to fill with reams of pink-papered police reports called Detective Division 5s. The computer age, I noticed, had made little impact on the day-to-day life of these officers. The two desks closest to the entrance were each manned by a glum-looking plainclothes cop, and it was obvious to me that they were two of the team of 17th Precinct squad members whose home had been taken over by the task force and who were shut out of the Dogen case-their natural turf-while relegated to handling all the usual business and public relations for the neighborhood. They looked on at the elite corps of interlopers like Cinderella must have looked at her stepsisters as they dressed for the ball.

To my right was a large holding pen-a jail cell furnished with only a long wooden bench, used to detain arrestees for the hours between an apprehension and the time the prisoner is taken down to Central Booking to begin the arraignment process. I was accustomed to seeing two or three men stretched out on the bench or the tile floor behind the locked bars when I arrived for a lineup or interrogation. I had never seen what I noticed tonight. There were eight men in and around the cell, which was wide open-some sitting, some reclining, one on the outside with his back against the bars, one pacing in and out of the entryway. They seemed from their filthy, mismatched clothes and unkempt appearance to be rejects from a homeless shelter. Nobody was watching them, and they didn’t appear to be in any particular distress.

At the desk in the far corner I could see the only other woman in the room. She was Anna Bartoldi, a mainstay of the Homicide Squad whom Peterson had no doubt assigned to supervise the detailed record keeping of what was bound to be a complicated investigation. Anna’s photographic memory, combined with her writing skills, would help the lieutenant track the hundreds of documents that would begin to be generated by the officers, whether working on the case or not, who would make note of statements given by witnesses or phoned in by well-meaning citizens, which would become the building blocks of evidence against the killer. Anna held a receiver to one ear and was writing in an oversized log that covered the desktops so I assumed she had already been running the tips hotline that had been announced just an hour earlier on the local news stations.