FORT LAUDERDALE, Fla. — A teenager who says he began a sexual relationship with a female teacher when he was 15 years old admitted on the stand Tuesday that he lied to police and in a sworn deposition, but denied that he made up the whole affair.

Defense lawyer David Bogenschutz combed through Donald Vaden's testimony from Monday in an effort to highlight what he called a "pack of lies" designed to cover up the 19-year-old's untruthful bragging about having sex with the defendant, teacher Beth Friedman.

Vaden, who was 14 when he met Friedman in her study skills class at Silver Lakes Middle School in North Lauderdale, claims that the now 42-year-old woman gave him gifts and more than $1,000 a week to be her secret boyfriend and lover. Bogenschutz worked hard Tuesday to blunt the damage caused by the key witness in the prosecution's statutory rape case, getting Vaden to admit that he lied about many things over the years.

Bogenschutz painted for the jury of six and two alternates a picture of a scheming young man who was aggressive, obsessed with sex, a thief and a drug-abusing liar who bragged a lot about his misconduct. Bogenschutz read from numerous school records as he grilled Vaden about observations educators made about him in reports obtained by the defense.

"That's someone's opinion," said Vaden, clearly annoyed by the line of questioning.

Beth Friedman listens to the testimony of her former student Monday.

Bogenschutz expressed incredulity as he highlighted contradictions between Vaden's direct testimony Monday and statements he gave to Hollywood police before Beth Friedman was arrested in August 1999 on charges that could send her to prison for 76 years.

For example, Vaden told police initially that the sexual relationship with Friedman did not start until after he dropped out of school. Vaden said the first time he had intercourse with his teacher was much earlier than he had told police, but he believed that she would not get in as much trouble if authorities believed he was already out of school at the time.

"I did it anyway because I didn't want to get her into trouble. I didn't want this to happen," said Vaden, who added later that he thought he was in love with Friedman. "Basically, you tell the truth when you want to tell the truth, don't you?" Bogenschutz shot back.

"I had feelings for this lady," Vaden answered. "I didn't want her to get hurt."

Bogenschutz, who appears to be trying to prove that Vaden was shaking Friedman down for cash and gifts, asked the witness why he didn't just deny a sexual relationship when police began investigating a complaint made by Vaden's parents in June 1999. Shortly before then, Vaden had told his mother that he had been sleeping with Friedman and that she had offered him $25,000 to impregnate her, according to his testimony.

"I was a confused little boy," Vaden said.

Confronted with contradictions about how many of Friedman's gifts he sold or kept, Vaden became agitated with Bogenschutz.

"So I missed that one. Mark that one as another lie," Vaden said sarcastically.

He also appeared to have trouble remembering his sexual history before meeting Friedman. Over the objections of prosecutor Stacey Honowitz, Bogenschutz confronted Vaden about inconsistencies in his trial testimony and previous statements about his sexual relationships with three teenaged girls. Vaden said in the past that he slept with three girls, but on Monday he said he had sex with only one girl before meeting Friedman.

Bogenschutz then attacked Vaden's pretrial testimony that he usually did not wear a condom when having sex with Friedman because he was trying to fulfill her desire to get pregnant. But in trial testimony, Vaden said he did not wear a condom because he typically "pulled out" before ejaculating on Friedman's breast and forehead.

"It sounds to me like you're lying," Bogenschutz said, without objection by Honowitz.

During her re-direct examination, prosecutor Horowitz asked Vaden if it was difficult to be testifying against someone he never wanted to see get into trouble.

--> "When you are in this courtroom across from Beth Friedman, what are you feeling?" Honowitz asked.

"Hurt. Pain," Vaden said. "It's hard to look at her. It's hard to explain."

Honowitz also revisited ground covered in Vaden's direct testimony Monday — the allegations of sex in exchange for cash, jewelry, trips and a Chevrolet Caprice costing $1,500. Vaden repeated that the relationship began with Friedman calling him cute, mature for his age and rubbing up against him.

"Did you ever say, 'Look, Miss Friedman. It's inappropriate. You're my teacher'?" Honowitz asked.

"No," Vaden said.

"Were you a willing participant in this?" she asked.

"Yes," Vaden said.

Getting in the last word, Bogenschutz on re-cross examination suggested that Vaden made up the sexual relationship because he liked to brag to his friends and was afraid or unwilling to admit to his "pack of lies" when police began investigating.

"You made a decision, Mr. Vaden, that the lies had to continue, didn't you?" the lawyer asked.

"No, I didn't," Vaden said.

"The lie goes on and on, doesn't it?" Bogenschutz continued.

"No, it doesn't," Vaden insisted.

Supporters of Friedman complained that Vaden snickered at the defense table, within earshot of jurors, as he left the stand. Grisel Vaden, his mother, is expected to be the prosecution's first witness when testimony resumes Wednesday.