Ms. Constand, a former Temple University employee, says Mr. Cosby drugged and sexually assaulted her at his home near here in 2004. Prosecutors introduced the other accounts saying they demonstrate Mr. Cosby’s signature pattern of predatory behavior.
But Mr. Cosby has denied any inappropriate behavior and said the sex with Ms. Constand was consensual. His first trial, last summer, ended with a hung jury.
His defense team made a sustained effort to shake Ms. Dickinson’s credibility, pushing her to acknowledge that a memoir she published in 2002 made no mention of an assault. Reading from the book in the courtroom, Thomas A. Mesereau Jr., a defense lawyer, said that Ms. Dickinson wrote she never entered Mr. Cosby’s room and ended up taking two quaaludes in her own room, alone.
“You told a tale to the jury today that is completely different from the book,” he said. “You made things up to get a paycheck.”
But Ms. Dickinson said she had been advised by her publishers to leave out the assault for legal reasons.
“You take poetic license in what you do,” she said. “Today I am on a sworn Bible.”
Four other women have told the jury of being drugged and assaulted by Mr. Cosby.
Ms. Dickinson, now 63, a reality TV celebrity, said she was working as a model in New York in 1982 when Mr. Cosby approached her through her agency and invited her to his Manhattan house to talk about acting.
Soon afterward, she said Mr. Cosby flew her to Lake Tahoe where she watched him perform, and they had dinner and discussed her career. She said she went to his hotel room to continue their conversation, and there she snapped some pictures — which were shown to the courtroom — of Mr. Cosby in a colored bathrobe and cap talking on the telephone.
Ms. Dickinson said that because she was knocked out by the drugs, she does not fully remember the sexual assault. But when she woke up, she said, she found herself back in her own room, alone. “I noticed semen between my legs, and I felt anal pain,” she said. “I felt very, very sore.”
The publisher of Ms. Dickinson’s memoir, Judith Regan, has confirmed there were discussions about putting the rape accusation in the book.
The defense has suggested that Mr. Cosby’s accusers are motivated by media attention and even money. On Thursday, the team carried the argument to the steps of the courthouse, where Mr. Cosby’s publicist, Andrew Wyatt, accused Gloria Allred, the civil rights attorney who is representing three of the five accusers, of being “part of the con.” Ms. Allred’s daughter, Lisa Bloom, represents Ms. Dickinson.
At one point, Mr. Wyatt asked Ms. Allred to explain her proposal to have Mr. Cosby set up a fund to compensate the women who have accused him of abuse.
“I’m so glad you asked that,” she shot back, “but you need to listen, and don’t interrupt.”
“I’m not your child,” Mr. Wyatt responded, and walked off.
Ms. Dickinson is one of about a dozen women who have outstanding civil suits against the entertainer, most of which are on hold pending the outcome of this criminal trial. Ms. Dickinson, like most of the other women, is suing him for defamation because she says his representatives characterized her as a liar when she came forward.
In the criminal case, Mr. Cosby’s lawyers have tried to show to the jury that there were holes in each of the women’s accounts. Mr. Mesereau confronted one accuser, Janice Baker-Kinney, on Thursday about what he described as discrepancies between the accounts she had given her sister and later the police and news media.
Ms. Baker-Kinney told the jury on Wednesday that Mr. Cosby drugged and sexually assaulted her in Reno in 1982 after giving her two pills. She was 24 at the time and working as a bartender.
“Is it true that you told your sister,” Mr. Mesereau asked, “you went there and drank too much and didn’t mention the pill?”
Ms. Baker-Kinney said she could not recall what she had told her sister.
But Mary Chokron, a friend, testified she had received a call soon after the encounter and that Ms. Baker-Kinney said she had been knocked unconscious by some kind of party drug. “She blamed herself for taking the pill,” Ms. Chokron said.
Ms. Baker-Kinney, a sports broadcast stage manager who now lives near San Francisco, said she did not speak out at the time because she feared she would be blamed for having put herself in that position and would be fired.
“That was the culture then,” she said, “and was for a very long time.”
Lise-Lotte Lublin, a teacher, told of an encounter with Mr. Cosby in a Las Vegas hotel room in 1989, when she was 23. She said she was there for an acting lesson, that he gave her two drinks and asked her to sit between his legs, and began to stroke her hair. She said she remembered little else. “When I woke up, I was at home,” she said, but she assumes she was sexually assaulted.
“You have no recollection of sexual assault?” Kathleen Bliss, a defense lawyer, asked several times.
“I would not have the memory because I was drugged,” Ms. Lublin replied.
An earlier version of this article misidentified Janice Dickinson’s legal representation. Her lawyer is Lisa Bloom, not Ms. Bloom and her mother, Gloria Allred.
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