Joran van der Sloot, the longtime suspect in the disappearance and death of Mountain Brook teen Natalee Holloway, is expected to plead guilty Wednesday morning in an extortion attempt against Holloway’s mother.

The 35-year-old van der Sloot is charged in the U.S. with extortion and wire fraud. He was indicted in the Northern District of Alabama in 2010.

Federal authorities contend that van der Sloot exploited the fear of Holloway’s mother, Beth, that she would never find her daughter’s body or know what happened to her unless she paid him $250,000.

As part of the plea agreement, Holloway family attorney John Q. Kelly told Today, “It was conditioned upon Mr. van der Sloot revealing details of how Natalee died and how her body was disposed of. There won’t be any further investigator or search…for Natalee’s remains.”

Does that mean van der Sloot will stand before a federal judge Wednesday and give a detailed account of what happened to Natalee, and then based on his statement in open court be charged with murder in Aruba?

Experts say neither is likely.

“I don’t think he’s going to confess to murder tomorrow” in court, said former Northern District of Alabama U.S. Attorney Jay Town.

“I think that’s something that’s probably going to be done by affidavit and given to the Holloway family and maybe we’ll never see it. I don’t know.”

Town said he believes van der Sloot will enter his guilty pleas on the extortion-related charges before U.S. District Court Judge Anna Manasco and be sentenced on the spot.

“I do expect that during the course of the proceedings, the Holloway family and friends of the family will have a chance to address the court and van der Sloot,’’ Town said.

“I don’t expect any of those words to be kind as regards to him.”

CNN reported on Tuesday that Beth Holloway is expected to hold a news conference following the hearing to make public what van der Sloot told the FBI in regards to Natalee’s disappearance and death.

Van der Sloot over the past 18 years has made various statements related to Natalee’s demise.

How can anyone be sure he will tell the truth on Wednesday?

“I don’t know exactly how the Bureau and DOJ might have verified that information,’’ Town said, “but I suspect they were able to do so by corroborating Joran’s confession with non- public information that only the killer would know.”

Van der Sloot is expected to be quickly returned to Peru, where he is currently serving a 28-year prison for the 2010 murder of Lima college student Stephany Flores. She was killed five years to the day Natalee disappeared.

Per the extradition agreement that brought van der Sloot to the U.S. in June, he was to be returned to Peru immediately upon adjudication in Alabama to finish his sentence there before having to service any sentence in the U.S.

“The U.S. will uphold its agreement with Peruvian government that after he’s found guilty and sentenced, he will be returned to Peru to finish his time there before he faces whatever penalties he’s going to face in the U.S.,’’ Town said.

“The fact that Joran van der Sloot is on American soil being prosected by the Department of Justice really shows the tenacity of DOJ and the FBI and that they didn’t leave their fight in the dressing room or label this case as just a $25,000 wire fraud case period,’’ he said.

Van der Sloot is likely ready to return to Peru where he has more liberties than he does in the Shelby County Jail, where he has been held for the past four months.

“He’s got a wife and girlfriend back there,’’ Town said. “He gets to sit in a cell and play online poker.”

Town, and other experts, aren’t confident van der Sloot will ever be prosecuted in Aruba in connection with Natalee’s death.

“He’s admitted it before, and Aruba hasn’t done anything about it,’’ Town said. “I think we’ll find there was a lot of corruption in Aruba that prevented not only the prosecution but even the investigation of the disappearance and death of Natalee Holloway.”

“Regardless of what the sentence might be or the plea agreement might suggest, I think we cannot lose sight of the fact that an 18-year quest by family, especially Beth Holloway, to bring Joran van der Sloot to some measure of American justice has been accomplished,’’ Town said.

“I think that shows tenacity by the FBI and by the U.S. Attorney’s office and DOJ,’’ he said, “and I’m glad the Holloway family will at least get some closure as it relates to this tragedy.”