The FBI is investigating the surreptitious taping of Michael Jackson and his lawyer aboard the rental plane that flew them to Santa Barbara for Jackson's surrender to authorities last week.

As federal authorities began investigating the taping incident aboard the charter jet, Los Angeles Superior Court Judge David Yaffe issued a restraining order prohibiting XtraJet, the airline Geragos said placed the cameras aboard the plane, from releasing the tapes until a hearing in December on a permanent injunction, according to a statement from Jackson spokesman Stuart Backerman.

Geragos has also filed a civil suit against the company. From Geragos' statement at a press conference yesterday:

"The videotaping of my client conferring with me was illegal and outrageous, as was the aircraft company's attempt to sell that tape for profit," Geragos said. "We will be absolutely relentless in our pursuit of any and all extortionists, regardless of how they try to gift wrap their lies in the cloak of justice. Michael is not going to be a piñata for every money-hungry publicity seeker to strike in the hopes of hitting it rich."

Cal Pen Code § 631 prohibits taping and disclosure of the communication unless both parties to the conversation consent. A Violation carries up to a year in the county jail and a fine. Federal law prohibits taping and disclosure of the communication unless one party consents. At least one media outlet reports viewing the video when the plane company tried to peddle it to them.

Other details emerging: Larry Feldman, the lawyer who represented Jackson's 1993 civil accuser, began representing the mother last March. It was Feldman's suggestion the boy see a therapist.

An attorney who a decade ago secured a settlement of at least $15 million for a 13-year-old boy who alleged that he was molested by the singer is involved in the current case, sources close to the investigation said.

Those sources said the mother of the boy that Jackson is alleged to have molested last winter approached Los Angeles attorney Larry Feldman in March after she became concerned that the singer had been giving wine to her cancer-stricken son, who had first asked to meet his idol.

At that point she was not aware of any alleged molestation, the source said. But as the boy told of his friendship with Jackson in bits and pieces, Feldman concluded that the boy needed to talk to a therapist, who in June reported alleged sexual abuse by Jackson to police, the source said.

We'll be discussing the case tonight on MSNBC's Abrams Report at 9 pm ET (repeats at 11 pm.)

Update: More details about the family of the accuser: