Sherburne County, Minn., Sheriff's Office, File, Associated Press
In this undated file photo provided by the Sherburne County Sheriff Office, Zacarias Moussaoui is shown. Claiming that he can offer inside information about al-Qaida that could support claims against Saudi Arabia and financial institutions, Moussaoui says he wants to testify in lawsuits filed by victims of terrorism. Some lawyers have taken him seriously enough to interview him at a maximum-security prison in southern Colorado. But others have questioned his motives.

NEW YORK — The so-called "20th hijacker" from the Sept. 11 attacks wants to testify in lawsuits filed by victims of terrorism.

The imprisoned Zacarias Moussaoui recently wrote to federal courts in New York and Oklahoma claiming he can offer inside information about al-Qaida that could support claims against Saudi Arabia and financial institutions.

Some lawyers have taken him seriously enough to interview him at a maximum-security prison in southern Colorado. But others have questioned his motives.

Moussaoui was arrested on immigration charges in August 2001 when employees of a Minnesota flight school became alarmed that he wanted to learn to fly a Boeing 747 even though he had no pilot's license.

He pleaded guilty in April 2005 to conspiring with the hijackers to kill Americans.