Ross looked at the head. It was squashed in on one side, like a deflated football, distorting the features of what had once been a conventionally pretty face.

"You'll notice," the doctor said, moving closer to the girl, "that she's put on half her make-up. As we reconstruct it, she's sitting at the dressing table, over there, making up. The blow comes from above and from the side, knocking her over in the chair, spilling the lotions and crap. Then she's lifted up" - the doctor raised his arms and frowned in mock effort, lifting an invisible body - "from the chair and placed on the bed."

"Somebody pretty strong?"

"Oh, yes. A man for sure."

"How do you know that?"

"Pubic hair in the shower drain. We've found two varieties. One matches hers, the other is male. Male pubic hair as you know is more circular, less elliptical in cross section than female hair."

"No," Ross said. "I didn't know that."

"I can give you a reference on it, if you want," the doctor said. "It's also clear that her killer had intercourse with her before the murder. We've got a blood type on the seminal fluid and it's AO. The man apparently takes a shower after intercourse, and then comes out and kills her."

Ross nodded.

"Following delivery of the blow to the head, she's lifted up and placed on the bed. At this time, she's not bleeding much. No blood to speak of on the dressing table or rug. But now her killer picks up some instrument and stabs her in the stomach several times. You'll notice that the deepest wounds are all in the lower abdomen, which may have some sexual connotations for the killer. But that's just guessing on our part."

Ross nodded but said nothing. She had decided the coroner's man was a creep; she wasn't going to tell him more than she had to. She moved closer to the body to examine the stab wounds. They were all small, puncture-like in appearance, with a good deal of skin tearing around the wounds.

"You find a weapon?"

"No," the doctor said.

"What do you think it was?"

"I'm not sure. Nothing very sharp, but something strong - it took a lot of force to penetrate this way with a relatively blunt instrument."

"Another argument that it's a man," Anders said.

"Yes. I'd guess it was something metal, like a blunt letter opener, or a metal ruler, or a screwdriver. Something like that. But what's really interesting," the doctor went on, "is this phenomenon here." He pointed to the girl's left arm, which was outstretched on the bed and mutilated badly by stab wounds. "You see, he stabbed her in the stomach, and then stabbed her arm, moving out in a regular way, a succession of stabbings. Now, notice: when he's past the arm, he continues to stab. You can see the tears in the sheet and blanket. They continue out in a straight line."

He pointed to the tears.

"Now," the doctor said, "in my book that's perseveration. Automatic continuation of pointless movement. Like he was some kind of machine that just kept going and going…"

"That's correct," Ross said.

"We assume," the doctor said, "that it represents some kind of trance state. But we don't know if it was organic or functional, natural or artificially induced. Since the girl let him into the apartment freely, this trance-like state developed only later."

Ross realized that the coroner's man was showing off, and it irritated her. This was the wrong time to be playing Sherlock Holmes.

Anders handed her the metal dog tag. "We were proceeding routinely with the investigation," he said, "when we found this."

Ross turned the tag over in her hand.

I HAVE AN IMPLANTED ATOMIC PACEMAKER. DIRECT PHYSICAL INJURY OR FIRE MAY RUPTURE THE CAPSULE AND RELEASE TOXIC MATERIALS. IN THE EVENT OF INJURY OR DEATH CALL NPS, (213) 652-1134.

"That was when we called you," Anders said. He watched her carefully. "We've leveled with you," he said. "Now it's your turn."

"His name is Harry Benson," she said. "He's thirty-four and he has psychomotor epilepsy."

The doctor snapped his fingers. "I'll be damned."

"What's psychomotor epilepsy?" Anders said.

At that moment, a plainclothesman came in from the living room. "We got a trace on the prints," he said. "They're listed in the Defense data banks, of all places. This guy had classified clearance from 1968 to the present. His name's Harry Benson, lives in L.A."

"Clearance for what?" Anders said.

"Computer work, probably," Ross said.

"That's right," the plainclothesman said. "Last three years, classified computer research."

Anders was making notes. "They have a blood type on him?"

"Yeah. Type AO is what's listed."

Ross turned to the doctor. "What do you have on the girl?"

"Name's Doris Blankfurt, stage name Angela Black. Twenty-six years old, been in the building six weeks."

"What does she do?"

"Dancer."

Ross nodded.

Anders said, "Does that have some special meaning?"

"He has a thing about dancers."

"He's attracted to them?"

"Attracted and repelled," she said. "It's rather complicated."

He looked at her curiously. Did he think she was putting him on?

"And he has some kind of epilepsy?"

"Yes. Psychomotor epilepsy."

Anders made notes. "I'm going to need some explanations," he said.

"Of course."

"And a description, pictures- "

"I can get you all that."

" -as soon as possible."

She nodded. All her earlier impulses to resist the police, to refuse to cooperate with them, had vanished. She kept staring at the girl's caved-in head. She could imagine the suddenness, the viciousness of the attack.

She glanced at her watch. "It's seven-thirty now," she said. "I'm going back to the hospital, but I'm stopping at home to clean up and change. You can meet me there or at the hospital."

"I'll meet you there," Anders said. "I'll be finished here in about twenty minutes."

"Okay," she said, and gave him the address.

The shower felt good, the hot water like stinging needles against her bare skin. She relaxed, breathed the steam, and closed her eyes. She had always liked showers, even though she knew it was the masculine pattern. Men took showers, women took baths. Dr. Ramos had mentioned that once. She thought it was bullshit. Patterns were made to be broken. She was an individual.

Then she'd discovered that showers were used to treat schizophrenics. They were sometimes calmed by alternating hot and cold spray.

"So now you think you're schizophrenic?" Dr. Ramos had said, and laughed heartily. He didn't often laugh. Sometimes she tried to make him laugh, usually without success.

She turned off the shower and climbed out, pulling a towel around her. She wiped the steam off the bathroom mirror and stared at her reflection. "You look like hell," she said, and nodded. Her reflection nodded back. The shower had washed away her eye make-up, the only make-up she wore. Her eyes seemed small now, and weak with fatigue. What time was her hour with Dr. Ramos today? Was it today?

What day was it, anyway? It took her a moment to remember that it was Friday. She hadn't slept for at least twenty-four hours, and she was having all the sleepless symptoms she'd remembered as an intern. An acid gnawing in her stomach. A dull ache in her body. A kind of slow confusion of the mind. It was a terrible way to feel.

She knew how it would progress. In another four or five hours, she would begin to daydream about sleeping. She would imagine a bed, and the softness of the mattress as she lay on it. She would begin to dwell on the wonderful sensations that would accompany falling asleep.

She hoped they found Benson before long. The mirror had steamed over again. She opened the bathroom door to let cool air in, and wiped a clean space with her hand again. She was starting to apply fresh make-up when she heard the doorbell.

That would be Anders. She had left the front door unlocked. "It's open," she shouted, and then returned to her make-up. She did one eye, then paused before the second. "If you want coffee, just boil water in the kitchen," she said.

She did her other eye, pulled the towel tighter around her, and leaned out toward the hallway. "Find everything you need?" she called.

Harry Benson was standing in the hallway. "Good morning, Dr. Ross," he said. His voice was pleasant. "I hope I haven't come at an inconvenient time."

It was odd how frightened she felt. He held out his hand and she shook it, hardly conscious of the action. She was preoccupied with her own fear. Why was she afraid? She knew this man well; she had been alone with him many times before, and had never been afraid.

The surprise was part of it, the shock of finding him here. And the unprofessional setting: she was acutely aware of the towel, her still-damp bare legs.

"Excuse me a minute," she said, "and I'll get some clothes on."

He nodded politely and went back to the living room. She closed the bedroom door and sat down on the bed. She was breathing hard, as if she had run a great distance. Anxiety, she thought, but the label didn't really help. She remembered a patient who had finally shouted at her in frustration,

"Don't tell me I'm depressed. I feel terrible!"

She went to the closet and pulled on a dress, hardly noticing which one it was. Then she went back into the bathroom to check her appearance. Stalling, she thought. This is not the time to stall.

She took a deep breath and went outside to talk with him.

He was standing in the middle of the living room, looking uncomfortable and confused. She saw the room freshly, through his eyes: a modern, sterile, hostile apartment. Modern furniture, black leather and chrome, hard lines; modern paintings on the walls; modern, glistening, machinelike, efficient, a totally hostile environment.

"I never would have thought this of you," he said.

"We're not threatened by the same things, Harry." She kept her voice light. "Do you want some coffee?"