"No. I really don't think so."

"Why not?"

"Because she was home for a while before she was assaulted."

I'd gone through it many times.

Lori drove home from the hospital, unlocked her front door and relocked it from the inside. She went into the kitchen and placed her knapsack on the table. Then she had a snack. Her gastric contents indicated she'd eaten several cheese crackers very close to the time she was assaulted. The food had scarcely begun to digest. Her terror when she was attacked would have caused her digestion to completely shut down. It's one of the body's defense mechanisms. Digestion shuts down to keep blood flowing to the extremities instead of to the stomach, preparing the animal for fight or flight.

Only it hadn't been possible for her to fight. It hadn't been possible for her to flee anywhere.

After her snack, she went from the kitchen to the bedroom. The police had found out it was her habit to take her oral contraceptive at night, right before bed. Friday's tablet was missing from the foil pack inside the master bathroom. She took her tablet, perhaps brushed her teeth and washed her face, then changed into her gown and placed her clothing neatly on the chair. I believed she was in bed when he attacked her not long afterward. He may have been watching her house from the darkness of the trees or the shrubbery. He may have waited until the lights were out, until he assumed she was asleep. Or he may have observed her in the past and known exactly what time she came home from work and went to bed.

I remembered the bedcovers. They were turned down as if she'd been under them, and there was no evidence of a struggle anywhere else in the house.

There was something else coming to me.

The smell Matt Petersen mentioned, the sweaty, sweet smell.

If the killer had a peculiar and pronounced body odor, it was going to be wherever he was. It would have lingered inside her bedroom had he been hiding there when Lori got home.

She was a physician.

Odors are often indications of diseases and poisons. Physicians are trained to be very sensitive to smells, so sensitive I can often tell by the odor of blood at a scene that the victim was drinking shortly before he was shot or stabbed. Blood or gastric contents reminiscent of musky macaroons, of almonds, may indicate the presence of cyanide. A patient's breath smelling of wet leaves may indicate tuberculosis - Lori Petersen was a physician, like me.

Had she noticed a peculiar odor the moment she walked into her bedroom, she would not have undressed or done anything else until she determined the source of it.

Cagney did not have my worries, and there were times when I felt haunted by the spirit of the predecessor I had never met, a reminder of a power and invulnerability I would never have. In an unchivalrous world he was an unchivalrous knight who wore his position like a panache, and I think a part of me envied him.

His death was sudden. He literally dropped dead as he was crossing the living room rug to switch on the Super Bowl. In the predawn silence of an overcast Monday morning he became the subject of his own instruction, a towel draped over his face, the autopsy suite sealed off from everyone but the pathologist whose lot it was to examine him. For three months, no one touched his office. It was exactly as he'd left it, except, I suppose, that Rose had emptied the cigar butts out of the ashtray.

The first thing I did when I moved to Richmond was to strip his inner sanctum to a shell and banish the last remnant of its former occupant including the hard-boiled portrait of him dressed in his academic gown, which was beneath a museum light behind his formidable desk. That was relegated to the Pathology Department at VMC, as was an entire bookcase filled with macabre mementos forensic pathologists are expected to collect, even if most of us don't.

His office - my office, now-was well-lighted and carpeted in royal blue, the walls arranged with prints of English landscapes and other civilized scenes. I had few mementos, and the only hint of morbidity was the clay facial reconstruction of a murdered boy whose identity remained a mystery. I'd arranged a sweater around the base of his neck and perched him on top of a filing cabinet where he watched the open doorway with plastic eyes and waited in sad silence to be called by name.

Where I worked was low-profile, comfortable but businesslike, my impedimenta deliberately unrevealing and bland. Though I somewhat smugly assured myself it was better to be viewed as a professional than as a legend, I secretly had my doubts.

I still felt Cagney's presence in this place.

People were constantly reminding me of him through stories that became more apocryphal the longer they lived on. He rarely wore gloves while doing a post. He was known to arrive at scenes eating his lunch. He went hunting with the cops, he went to barbecues with the judges, and the previous commissioner was obsequiously accommodating because he was absolutely intimidated by Cagney.

I paled by comparison and I knew comparisons were constantly being made. The only hunts and barbecues I was invited to were courtrooms and conferences in which targets were drawn on me and fires lit beneath my feet. If Dr. Alvin Amburgey's first year in the commissioner's office was any indication, his next three promised to be the pits. My turf was his to invade. He monitored what I did. Not a week went by that I didn't get an arrogant electronic memo from him requesting statistical information or demanding an answer as to why the homicide rate continued to rise while other crimes were slightly on the decline - as if somehow it was my fault people killed each other in Virginia.

What he had never done to me before was to schedule an impromptu meeting.

In the past, when he had something to discuss, if he didn't send a memo he sent one of his aides. There was no doubt in my mind his agenda was not to pat me on the back and tell me what a fine job I was doing.

I was abstractedly looking over the piles on my desk and trying to find something to arm myself with-files, a notepad, a clipboard. For some reason, the thought of going in there empty handed made me feel undressed. Emptying my labcoat pockets of the miscellaneous debris I had a habit of collecting during the day, I settled for tucking in a pack of cigarettes, or "cancer sticks," as Amburgey was known to call them, and I went out into the late afternoon.

He reigned across the street on the twenty-fourth floor of the Monroe Building. No one was above him except an occasional pigeon roosting on the roof. Most of his minions were located below on floor after floor of HHSD agencies. I'd never seen his office. I'd never been invited.

The elevator slid open onto a large lobby where his receptionist was ensconced within a U-shaped desk rising from a great field of wheat-colored carpet. She was a bosomy redhead barely out of her teens, and when she looked up from her computer and greeted me with a practiced, perky smile, I almost expected her to ask if I had reservations and needed a bellhop to manage my bags.

I told her who I was, which didn't seem to fan the smallest spark of recognition.

"I have a four o'clock appointment with the commissioner," I added.

She checked his electronic calendar and cheerily said, "Please make yourself comfortable, Mrs. Scarpetta. Dr. Amburgey will be with you shortly."

As I settled myself on a beige leather couch, I searched the sparkling glass coffee and end tables bearing magazines and arrangements of silk flowers. There wasn't an ashtray, not a single one, and at two different locations were "Thank You for Not Smoking" signs.

The minutes crept by.

The redheaded receptionist was sipping Perrier through a straw and preoccupied with her typing. At one point she thought to offer me something to drink. I smiled a "no, thank you," and her fingers flew again, keys rapidly clicked, and the computer complained with a loud beep. She sighed as if she'd just gotten grave news from her accountant.