EXCLUSIVE: Joran van der Sloot, the 36-year-old killer suspected in the 2005 disappearance of Alabama teen Natalee Holloway in Aruba, had his U.S. extradition approved this week without a hearing, his lawyer told Fox News Digital, adding that he believes prosecutors are eyeing additional charges.

"I don’t trust the judicial system in the United States at this moment," Maximo Altez, van der Sloot’s defense attorney in the 2012 murder trial for the death of Stephany Flores, said Friday.

He believes the U.S. will try to tack on homicide charges to his extortion and wire fraud case, he said. And he has not yet been able to speak with his client despite the unexpected news of his expected extradition.

"We are not fighting for Joran’s innocence, we are fighting that his rights are respected," Altez said. "We are asking for due process."

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Joran Van der Sloot with police at airport 2010

Joran Van der Sloot (2nd L) is escorted by police officers to the airport in Santiago June 4, 2010.  Van der Sloot of the Netherlands, who was arrested twice over the disappearance of a U.S. student in Aruba in 2005, was arrested in Chile for the murder of Peruvian business student and heiress Stephany Flores. He was convicted of her murder in 2012 and sentenced to 28 years in prison. (REUTERS/Victor Ruiz Caballero, File)

As the last person seen with Holloway, van der Sloot has been the prime suspect in her disappearance and presumed death. Exactly five years after she vanished, van der Sloot beat the second woman, Flores, to death in a hotel room and fled to Chile. He was convicted two years later.

Holloway was visiting Aruba on a trip to celebrate high school graduation with a large group of friends and vanished after she left a night club with van der Sloot and two of his pals, Satish and Deepak Kalpoe, on the last night of the trip.

Natalee Holloway center with friends

Natalee Hollway, center, went missing during a spring break trip in 2005 and was never found. She was pronounced legally dead in 2012. (FBI)

Van der Sloot is not charged in Holloway's death, but is accused of trying to extort her mother for $250,000. 

"People are not going for justice, they’re going for revenge," Altez said. "People are confusing the two as if they’re synonyms."

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However, legal experts say it's unlikely that the Justice Department would resort to the subterfuge, or be sitting on evidence in Holloway's case.

"Anything’s possible, but I think that’s unlikely that he wouldn’t have been extradited already," said Neama Rahmani, a former federal prosecutor now practicing privately in Los Angeles. "It would’ve already happened by now."

Prosecutors would be hungry to crack a cold case, he said, and they wouldn't be shy about seeking a grand jury indictment if they had sufficient evidence. Unless, he said, the U.S. plans to seek the death penalty, which would be surprising under the Biden administration.

Family mourning at funeral

Mariaelena Ramirez, right, and Peruvian businessman Ricardo Flores, second from right, walk with unidentified people during the funeral of their daughter Stephany Flores in Lima, Thursday, June 3, 2010. Flores, 21, was killed in a Lima hotel Sunday. The suspect, Dutch Joran van der Sloot, was arrested Thursday in neighboring Chile. Van der Sloot has also long been suspected in the disappearance of an Alabama teen Natalee Holloway in Aruba, which occurred five years to the day before Flores’ murder. (AP Photo/Karel Navarro, File)

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The government in Peru approved extradition as early as Tuesday, Altez told Fox News Digital. The arrangement would be temporary. After a trial in the U.S. in connection with his 2010 indictment on extortion and wire fraud charges, van der Sloot would be returned to Peru to finish his sentence for Flores' murder and a separate charge of trafficking drugs in prison. He is currently slated for release in June 2038. 

Natalee Holloway in graduation gown, left, with father

Natalee Holloway, 18, with her father, Dave Holloway on her graduation day from Mountain Brook High School in Mountain Brook, Ala., on May 24, 2005.   (Courtesy Beth Twitty/ZUMA Press, File)

If convicted in the U.S., he would then be sent to a federal prison.

If van der Sloot plans to fight extradition as expected, Altez would file a habeas corpus petition opposing the move, he told Fox News Digital.

That would temporarily "paralyze" the extradition, he said. He added that the petition is already prepared but likely would face an uphill fight.

"Joran is receiving a media trial," Altez said, speaking in Spanish from Peru.

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Joran van der Sloot in green T-shirt at court

Dutch citizen Joran Van der Sloot walks inside the courtroom during the reading of his verdict, in the Lurigancho prison in Lima, Jan. 13, 2012. Van der Sloot was sentenced to 28 years in prison by a Peruvian court on Friday for killing Stephany Flores in Lima in 2010, exactly five years after 18-year-old Alabama native Natalee Holloway disappeared on the island of Aruba after spending time with him.        (REUTERS/Pilar Olivares, File)

If the bid to fight extradition fails, Altez said timing and transportation still need to be worked out with U.S. Marshals.

If he faces a judge in Alabama, van der Sloot will ask the federal court for a public defender because he lacks the financial means to hire a private attorney, Altez said.

Some of van der Sloot’s supporters, however, believe the extradition may lead to an upgrade in his circumstances.

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"The Challapalca prison is the worst prison in the world", Altez explained. "Joran is in hell. He would go to a hell that is more comfortable."