McGovern watched me as I walked up.

'This is Mrs Harvey,' she said to me. 'The next-door neighbor.'

'Hello,' I said to Mrs Harvey, whose eyes were bright with excitement that bordered on fear.

'Dr Scarpetta is a medical examiner,' McGovern explained.

'Oh,' said Mrs Harvey.

'Did you see Kellie again that night?' McGovern then asked.

The woman shook her head.

'She went in,' she said, 'I guess, and that was it. I know she worked real hard and usually didn't stay up late.'

'What about a relationship? Was there anybody she saw?'

'Oh, she's been through them,' Mrs Harvey said. 'A doctor here and there, different folks from the hospital. I remember last year she started seeing this man who had been her patient. Nothing lasted very long, it seems to me. She's so beautiful, that's the problem. The men wanted one thing, and she had something different in mind. I know because she used to make remarks about it.'

'But nobody recently?' McGovern asked.

Mrs Harvey had to think.

'Just her girlfriends,' she replied. 'She has a couple people she works with, and sometimes they dropped by or went off somewhere together. But I don't remember any activity that night. I mean, that's not saying I would know. Someone could have come over, and I wouldn't necessarily have heard a thing.'

'Have we found her cat?' I asked.

McGovern did not answer.

'That darn cat,' Mrs Harvey said. 'Pumpkin. Spoiled, spoiled, spoiled.'

She smiled and her eyes filled with tears.

'That was her child,' Harvey said.

'An indoor cat?' I then asked.

'Oh, absolutely. Kellie never let that cat out of the house, treated him like a hothouse tomato.'

'His litter box was found in the backyard,' McGovern told her. 'Did Kellie sometimes empty it and leave it out all night? Or for that matter, did she have a habit of emptying it at night? Going out after dark, the door unlocked and the alarm off.'

Harvey looked confused, and I suspected she had no idea that her neighbor had been murdered.

'Well,' she said, 'I do know that I've seen her empty the litter before, but always in a trash bag that went into the super can. So it wouldn't make sense for her to do that at night. My guess is, she might have emptied it and left it outside to air, you know? Or maybe she just didn't have time to hose it off and was going to do it the next morning. But whatever the case, that cat knew how to use the toilet. So it wouldn't be any big deal for him to be without his litter box for a night.'

She stared off at a state police car cruising by.

'No one's said how the fire started,' Harvey went on. 'Do we know?'

'We're working on it,' McGovern said.

'She didn't die… well, it was quick, wasn't it?'

She squinted in the setting sun, and she bit her lower lip.

'I just don't want to think she suffered,' she said.

'Most people who die in fires don't suffer,' I answered, evading her question with gentle words. 'Usually carbon monoxide overcomes them and they aren't conscious.'

'Oh, thank God,' she said.

'I'll be inside,' McGovern said to me.

'Mrs Harvey,' I said, 'did you know Kellie very well?'

'We've been neighbors for almost five years. Not that we did a whole lot together, but I certainly knew her.'

'I'm wondering if you might have any recent photographs of her, or know someone who might?'

'I might have something.'

'I have to make sure of the identification,' I then said, although my motive was other than that.

I wanted to see for myself what Shephard had looked like in life.

'And if there's anything else you can tell me about her, I would appreciate it,' I went on. 'For example, does she have family here?'

'Oh no,' Harvey said, staring at her neighbor's ruined house. 'She was from all over. Her father was military, you know, and I think he and her mom live somewhere in North Carolina. Kellie was very worldly from having moved around so much. I used to tell her I wished I could be as strong and smart as her. She didn't take crap off anyone, let me tell you. One time there was a snake on my deck, and I called her, all hysterical. She came on and chased it in the yard and killed it with a shovel. I guess she had to get that way because the men just wouldn't leave her alone. I always told her she could be a movie star, and she would say, But Sandra, I can't act. And I would say, But neither can most of them!'

'She was pretty streetwise, then,' I said.

'You bet. That's why she had that burglar alarm put in. Feisty and streetwise, that's Kellie. If you want to come in with me, I'll see what I can do about pictures.'

'If you don't mind,' I said. 'That's very nice of you.'

We cut through a hedge and I followed her up steps into her big, bright kitchen. It was apparent that Harvey liked to cook, based on a well-stocked pantry and every conceivable appliance. Cookware hung from hooks in the ceiling, and whatever was simmering on the stove smelled rich with beef and onions, perhaps a stroganoff or stew.

'If you want to sit right over there by the window, I'll go get what I've got from the den,' she said.

I took a seat at the breakfast table and looked out the window at Kellie Shephard's house. I could see people passing behind broken windows, and someone had set up lights because the sun was low and smoldering. I wondered how often her neighbor had watched her come and go.

Certainly, Harvey was curious about the life of a woman exotic enough to be a movie star, and I wondered if someone could have stalked Shephard without her neighbor noticing a strange car or person in the area. But I had to be careful what I asked, because it was not publicly known that Shephard had died a violent death.

'Well, I can't believe it,' Harvey called out to me as she returned to the kitchen. 'I got something better. You know, some television crew was at the hospital last week filming a feature about the trauma center. It showed on the evening news, and Kellie was in it, so I taped it. I can't believe it took me this long to think of it, but my brain's not working all that well, if you know what I mean.'

She was holding a videotape. I accompanied her into the living room, where she inserted the tape into the VCR. I sat in a blue wing chair in a sea of blue carpet while she rewound and then hit the play button. The first few frames were of Lehigh Valley hospital from the perspective of a helicopter swooping in with an emergency case. It was then I realized that Kellie was really a medflight paramedic, and not merely a nurse on a ward.

Footage showed Kellie in a jumpsuit dashing down a corridor with other members of the flight crew who had just been paged.

'Excuse me, excuse me,' she said on tape as they darted around people in the way.

She was a spectacular example of the human genome working just right, her teeth dazzling, and the camera in love with every angle of her fine features and bones. It was not hard to imagine patients getting major crushes on her, and then the film showed her in the cafeteria after another impossible mission had been accomplished.

'It's always a race against time,' Shephard was telling the reporter. 'You know even a minute's delay could cost a life. Talk about an adrenaline rush.'

As she continued her rather banal interview, the angle of the camera shifted.

'I can't believe I taped that, but it's not often someone I know is on TV,' Harvey was saying.

It didn't penetrate at first.

'Stop the tape!' I said. 'Rewind. Yes, right there. Freeze it.'

The frame was of someone in the background eating lunch.

'No,' I said under my breath. 'No way.'

Carrie Grethen was wearing jeans and a tie-dye shirt, and eating a sandwich at a table with other busy hospital personnel. I had not recognized her at first because her hair was below her ears and henna red, and last I had seen her, it was short and bleached white. But it was her eyes that finally pulled at me like a black hole. She was staring straight into the camera as she chewed, her eyes as coldly bright and evil as I remembered.