Mr. Pfeifer repeatedly said he was ashamed and sorry for his actions involving Ms. Finn and Mr. Pellicano. He has pleaded guilty to aiding and abetting Mr. Pellicano and is awaiting sentencing.

Next, Ms. Finn, after describing her several years as a high-priced escort, testified that she had given honest testimony in Mr. Pfeifer’s 2000 lawsuit about his use of illegal drugs. But, she said, she approached Mr. Pellicano in early 2001 to make a deal after his harassment  fueled by information gleaned from months of wiretapping  ran up her own legal bills and drove her to near bankruptcy.

That led to a new sworn declaration, she said, in which she disavowed her previous testimony about illegal drugs. “I said what I needed to so I could try to have a life again,” she said Tuesday.

In his testimony, Mr. Pfeifer also said that Mr. Pellicano had told him that another music industry figure previously linked to the wiretapping case  Freddy DeMann, the Maverick Records executive and former manager of Madonna and other acts  had paid some $80,000 to Mr. Pellicano to confirm his suspicions that his daughter’s husband was being unfaithful to her and that the husband was actually gay. Mr. Pellicano obtained audio proof of this, Mr. Pfeifer testified. Mr. DeMann did not respond to a phone message. seeking comment.

Under prosecutors’ questioning, Mr. Pfeifer also testified that Mr. Pellicano once canceled a meeting with him to attend one with Michael Ovitz, the former talent agent. More information on that score could come as soon as Wednesday, when Bryan Lourd and Kevin Huvane, two top partners at the Creative Artists Agency, Mr. Ovitz’s former firm, are among the possible witnesses.

Mr. Pfeifer also suggested that Alan J. Weil of Gaims, Weil, West & Epstein, a Los Angeles law firm, who became Mr. Pfeifer’s lawyer at Mr. Pellicano’s direction, was aware of the wiretapping.

Mr. Pfeifer said Mr. Pellicano proposed sending Ms. Finn a wreath of black roses at a resort where he had learned from a wiretap that she would be entertaining a client. “Alan Weil said, ‘You can’t do that,’ ” Mr. Pfeifer testified, “ ‘because how would you have known she was here? You can’t expose that.’ ”