the memory to construct fantasy. He will be able to use the act to fantasize and stimulate arousal during masturbation or normal sex.”

“Do you mean that he will sort of replay the murder in his mind so that he can become sexually aroused for having normal sexual intercourse with, say, his wife?”

Chandler objected and Belk had to rephrase the question so it was not leading Locke.

“Yes, he will replay the aberrant act in his mind so that he can accomplish the act that is socially acceptable.”

“So in doing so, a wife, for example, might not even know of her husband's real desires, correct?”

“That is correct. It has happened often.”

“And a person such as this could carry on at work and with friends and not reveal this side of himself, correct?”

“Again, that is correct. There is ample evidence of this in the case histories of sexual sadists who kill. Ted Bundy led a well-documented double life. Randy Kraft, killer of dozens of hitchhikers here in Southern California. I could name many, many more. You see, this is the very reason they kill so many victims before being caught, and then it is usually only because of a small mistake.”

“Like with Norman Church?”

“Yes.”

“As you testified earlier, you could not find or gather enough information about Norman Church's early development and behavior to include him in your book. Does that fact dissuade you from belief that he was the killer police claim him to be?”

“Not in the least. As I said, these desires can be easily cloaked in normal behavior. These people know they have desires that are not accepted by society. Believe me, they take pains to hide them. Mr. Church was not the only subject I considered for the book and then discarded for lack of valuable information. I did preliminary studies of at least three other serial killers who were either dead or uncooperative and dropped them as well because of the lack of public record or background on them.”

“You mentioned earlier that the roots of these problems are planted in childhood. How?”

“I should have said ‘may,’ the roots may be planted in childhood. It is a difficult science and nothing is known for sure. Getting to your question, if I had a definite answer I guess I wouldn't have a job. But what psychoanalysts such as myself believe is that the paraphilia can come through emotional or physical trauma or both. It basically is a synthesis of these, possibly some biological determinants and social learning. It is hard to pinpoint, but we believe it happens very early, generally five to eight years of age. One of the fellows in my book was molested by an uncle at age three. My thesis, or belief or whatever you want to call it, is that this trauma set him on the trail toward becoming a murderer of homosexuals. In most of these killings he emasculated his victims.”

The courtroom had become so quiet during Locke's testimony that Bosch heard the slight bump of one of the rear doors opening. He glanced back and saw Jerry Edgar taking a seat in the rear row. Edgar nodded at Harry, who looked up at the clock. It was 4:15; the trial would be recessed for the day in fifteen minutes. Bosch figured Edgar was on his way back from the autopsy.

“Would the childhood trauma that's at the root of a person's criminal activities as an adult need to be so overt? In other words, as traumatic as molestation?”

“Not necessarily. It could be rooted in more traditional emotional stress placed on a child. The awesome pressure to succeed in a parent's eyes, coupled with other things. It is hard to discuss this in a hypothetical context because there are so many dimensions of human sexuality.”

Belk followed up with a few more general questions about Locke's studies before ending. Chandler asked a couple more questions on redirect but Bosch had lost interest. He knew that Edgar would not have come to the courtroom unless he had something important. Twice he glanced back at the clock on the wall and twice he looked at his watch. Finally, when Belk said he had nothing further on cross, Judge Keyes called it a day.

Bosch watched Locke step down and head out through the gate and toward the door. A couple of the reporters followed him. Then the jury stood and filed out.

Belk turned to Bosch as they watched and said, “Better be ready tomorrow. My guess is that it's going to