Someone has been leaking something in Michael Jackson's child-molestation case, but Santa Barbara sheriff's investigators want to make clear that they're not the ones responsible.

On Monday, the sheriff's office posted a message on its Website denying that it had released confidential material to the media and stating that an investigation had been launched to determine who might be responsible.

Authorities said that the release of the materials was a crime, as they are covered by Superior Court Judge Rodney Melville's strict gag order over the case.

"Recently, there has been a noticeable increase in the release to the public of highly confidential transcripts, investigative reports and documents about the Michael Jackson case," the statement read.

"We consider the release of these materials to be a violation of the law. Some media commentators have alleged that we are responsible for these leaks. We are not. These accusations are irresponsible, unfounded and untrue."

The statement came in response, at least in part, to a recent ABC News report that quoted from sealed transcripts of grand jury testimony given by Jackson's teenaged accuser.

Per the Primetime Live report, the boy testified that Jackson "put his hand down my pants and he started rubbing me...my private area." While Jackson did this, the boy said, the singer's "eyes were like squinching [sic] really tight."

In other revelations, the accuser's brother recalled seeing an erect Jackson walk around in the buff.

"He started to tell us it was natural...It's just normal," the boy testified, according to the report.

ABC News has not revealed how it happened to come by more than 1,900 pages of grand jury testimony.

In California, grand jury transcripts are normally made public 10 days after they are received by the defendant. However, Melville has elected to keep the Jackson transcripts sealed along with most other materials relating to the case, a decision that has rankled many media hides.

In further Jackson action, court documents released Monday showed that the prosecution wants to introduce into evidence "erotic materials" seized from Neverland Ranch, arguing that the books, magazines and videos would show that the entertainer had sexual motives for touching his accuser.

Details of said erotic materials were largely blacked out by Melville.

"The people seek to introduce numerous...books, videos and magazines seized on Nov. 13, 2003, from the defendant's master bedroom suite at Neverland Valley Ranch, the video arcade and from a room adjoining the defendant's private office in a security building," District Attorney Tom Sneddon said in the court documents.

"The people also seek to admit three hardcover books and two photographs seized from the defendant's Neverland Ranch by the Los Angeles Police Department in August 1993," the documents said.

Jackson's legal team was expected to oppose the motion in a hearing on Friday.

Also on Monday, attorneys representing a coalition of media organizations filed a motion seeking to keep the testimony of child witnesses in the case open to the public. Last week, prosecutors asked that testimony from Jackson's accuser and his brother be conducted in private, arguing that the media and the public could listen to the testimony via an audio feed.

Media attorney Theodore Boutrous argued that the brothers' identities were made public when they appeared in Martin Bashir's 2003 documentary, Living with Michael Jackson, and "there are no benefits created by eliminating the public's ability to observe the proceedings."

"The ability to observe, not merely to listen or read, testimony is a fundamental aspect of the public's First Amendment right to attend a criminal trial," Boutrous wrote in the motion.

Melville was expected to consider the motion at Friday's hearing.

Jackson has been charged with 10 felony counts, ranging from child molestation to conspiracy. He has pleaded innocent to all charges and remains free on $3 million bail.

Jury selection in the trial is scheduled to begin Monday, when hundreds of Jackson's potential peers will report to the courthouse for questioning.