BROOKLYN (CN) - The so-called "20th hijacker" is now telling federal officials that a Saudi Arabia prince was the true "mastermind" of Sept. 11, 2001 attacks.
Letters that Zacarias Moussaoui filed on Nov. 3 and on Nov. 5 in the Western District of Oklahoma and the Eastern District of New York, respectively, say Prince Turki bin Faisal Al Saud and his wife were the real masterminds of 9/11.
Moussaoui, a French citizen, is doing life in prison after pleading guilty to conspiracy charges related to his involvement in the al-Qaida terrorist attacks on the World Trade Center and the Pentagon, which killed nearly 3,000 people.
He had been arrested in August 2001, one month before the attacks, for overstaying his visa after his flight instructor in Minnesota grew suspicious.
The four-page, handwritten letter that Moussaoui filed in Oklahoma says he met with the Al Saud and his wife "before 9/11" in Norman, Okla.
Princess Haifa bint Faisal gave him money to "channel a large amount of money" to the other 19 hijackers who carried out the attacks that killed nearly 3,000, according the filing.
Moussaoui says he's willing to testify about the royal family's support of Osama bin Laden's plot.
Prison officials have attacked Moussaoui to prevent such testimony, however, the filing states.
In recommending that the court dismiss Moussaoui's action without prejudice, U.S. Magistrate Shon Erwin noted that the government has said there is "no reason" for Moussaoui to testify.
Moussaoui's letter to the Brooklyn court involves his alleged participation in a plot to shoot down Air Force One with the "assistance of a top Saudi Embassy employee and to assassinate Bill and/or Hillary Clinton" while they were in England.
Also handwritten, this five-page filing says that the Saudi prince was the ringleader on a plan "to attack the White House and the Pentagon," but was "concerned that the plan [sic] well [sic] be shot down by air defence [sic] before reaching the White House and the Pentagone [sic]."
Both of Moussaoui's letters are signed "Slave of Allah."
The Brooklyn letter details a plan to shoot down Air Force one with the help of the Saudi Arabian embassy "using a stinger smuggle [sic] in the U.S. through the S.A. embassy."
Moussaoui says he told all this to the Secret Service in May and June of 2014, but that prison officials in Colorado have waged a "systematic campaign of harassment" to stop him from testifying against the "real 9/11 mastermind," the Saudi prince and princess.
Bin Laden allegedly sent Moussaoui as a "courier" to give, "by hand," a letter to now-king Abdullah ibn Abdillaziz and others in the royal family, the letter states.
Moussaoui claims to have met with the Saudi royals in both Oklahoma and Dallas in 2001.
He also says he "computerized [sic] the financial record of Al Qaeda" with several banks, including Arab Bank, which a federal jury in Brooklyn found liable in September for 24 separate Hamas-sponsored terrorist attacks in Israel in the early 2000s.
Moussaoui letter in Brooklyn complains there's been a "call for my death," and that fellow inmates from the Mexican Mafia and the Bloods "have vow [sic] to kill me."
He wants to be moved from the unit in Colorado to a cell that isn't "rodent infested and freezing."
He also wants the court to un-freeze his bank account so that he can buy stamps.