AP: Culkin to Testify in Jacko's Defense

Former child star Macaulay Culkin (search) and two other young men who stayed at Michael Jackson's (search) Neverland estate in the early 1990s have agreed to testify in the pop star's defense in his child molestation trial, The Associated Press has learned.

They are expected to say that nothing inappropriate happened between them and the singer.

Meanwhile, the jury in the Jackson trial was getting a break on Friday — there's no testimony scheduled until Monday.

Prosecutors lost a key battle Thursday when Superior Court Judge Rodney Melville (search) refused their request to allow testimony from a domestic violence expert to explain why the mother of Jackson's accuser lied under oath.

The Jackson trial is not about domestic violence and "it would be a mistake to allow it," Melville said Thursday.

Melville also refused to allow the prosecution to present a lurid account from a former Jackson employee and excluded testimony from a travel agent about a Jackson plane trip.

Despite the victories, Jackson's defense was unable to block the testimony of a former Jackson security guard who was recently arrested for investigation of robbery in Las Vegas.

Jackson, 46, is accused of molesting a 13-year-old cancer patient in February or March 2003. He also is accused of conspiring to hold the boy's family captive to get them to make a rebuttal video following the airing of the damaging Martin Bashir (search) documentary "Living With Michael Jackson," in which the accuser appeared with Jackson.

In the documentary, the singer said he let children sleep in his bed, but that it was non-sexual.

Though excluding salacious details that were to be offered by former Jackson employee Kassim Abdool (search), the judge did allow other testimony from him in an effort to corroborate former Jackson security guard Ralph Chacon (search), who claims he saw Jackson commit a sex act on a child in 1992 or 1993.

The judge agreed to allow Abdool to testify about seeing Jackson hug a child and to say that he saw Jackson leaving a shower area on the ranch, carrying a boy piggyback. Prosecutors said Abdool would allege he went to the shower area and saw two pairs of swim trunks.

The testimony ruled out by the judge included Abdool's claim that he saw the star appearing to be in an aroused state.

The boy received a settlement from Jackson in 1994 and subsequently declined to cooperate in a criminal investigation. No charges were filed.

Chacon and Abdool were plaintiffs in a wrongful termination lawsuit against Jackson that they lost and were ordered to pay damages to Jackson.

On another issue, the judge ruled another former Jackson guard, Christopher Carter, can testify — and invoke Fifth Amendment protection if asked about his recent arrest in Las Vegas on charges including robbery and kidnapping.

Prosecutors have said they expect to begin wrapping up their case against the pop star soon.

The Associated Press contributed to this report.