Federal court records also show Barresi and his wife filed for Chapter 7 bankruptcy in 2010.
Tabloid stands by story
A Sunday People spokesman would not confirm that Barresi was the paper's source or if it paid for access, but he did stand by the story.
"Our article clearly states that we have seen copies of reports, phone transcripts and interviews carried out by an agent working for private investigator Anthony Pellicano who had been hired by Michael Jackson," Rupert Smith said in an e-mail to CNN. "The files were seized by the FBI when Pellicano was himself investigated in 2002. The documents then became part of the FBI's files on Jackson case numbers CADCE MJ-02463 and CR 01046."
In fact, the FBI released files it collected on Michael Jackson in December 2009, six months after his death. Most of them related to the federal agency's support of the California investigations of child molestation allegations against the entertainer.
Los Angeles Police, who were investigating child molestation allegations against Jackson, called the FBI's Los Angeles office in September 1993 to suggest the agency look into a "possible federal violation against Jackson concerning transportation of a minor across state lines for immoral purposes (Mann Act)", one document said.
The Los Angeles County district attorney did not pursue criminal charges against Jackson, but the singer did reach a confidential financial settlement with the 1993 accuser, Jordan Chandler, and his father after they filed a lawsuit. Reports at the time said the Chandlers got between $16 million and $20 million from Jackson's insurance company.
The Chandler accusation became a key part of the prosecution's case when Jackson was tried and acquitted of molestation a decade later in Santa Barbara County, California.
Mesereau, who reviewed the 330 redacted pages released by the FBI, said the documents purported by the newspaper to have been included in the files were not there.
CNN also reviewed the files, which are still posted on the FBI website, and found none referring to other payoffs by Jackson. None of the file numbers matched those quoted by the newspaper.
"You can imagine what the prosecutor in Santa Barbara would have done with this information if they really had it," Mesereau said.
Phillip LeMarque did testify, telling the court that he once caught Jackson improperly touching then-child actor Macaulay Culkin while he worked as Jackson's self-described cook and "majordomo" for about 10 months in 1991.
Culkin, the second witness called in Jackson's defense, denied any improper touching by Jackson.
Jackson's guilt is 'inconsequential'
Barresi represented the LaMarques in an attempt to sell their story to tabloid media outlets, Mesereau said.
LeMarque admitted at the trial that he tried to make money from his story, even meeting with Barresi, who promised him $100,000 from the tabloid press, maybe more if the story were dirtier.
"He began to make the story more and more graphic as the price went up," Mesereau said, referring to Phillip LaMarque.
"Was it true that the broker told him the payoff might be higher if Mr. Jackson's hand was inside Culkin's pants?" Mesereau asked during cross examination.
"That's what he said," LeMarque said.
Barresi discussed his deal with the LaMarques in an interview for a PBS "Frontline" documentary in 1994.
"My interest in helping them was that they promised me a percentage of what they made," Baressi said. "I was not on any kind of crusade to bring anyone to justice. Whether Michael was guilty or innocent at that point was inconsequential. My interest was strictly for the money, as was theirs, I might add."