US authorities have been analyzing Siddiqui's saliva, hair, and fingernail scrapings to determine, if possible, what evidence they can find of any exposure to chemical, biological or radiological materials with potential use in weapons of mass destruction, sources said. ABC is not aware of the outcomes, if any, of those tests.
"Her education troubled us. We know that she's extremely bright. She's radicalized. We knew that she had been planning, or at least involved in the planning, of a wide variety of different operations, whether they involved weapons of mass destruction or research into chemical or biological weapons, whether it was a possible attempt on the life of the President," said Kiriakou. "We knew that she was involved with a great deal and we had to bring her into custody."
She also carried excerpts from "The Anarchist's Arsenal" and "documents detailing United States military assets", according to the federal complaint against her filed July 31st in Manhattan. It was about that time when Siddiqui was shipped to New York on an FBI jet accompanied by an FBI doctor, the Assistant Special Agent in Charge of the New York Joint Terror Task Force, a New York City Police Dept. detective and a number of other U.S. law enforcement personnel.
Interest in Siddiqui is in itself not new. On May 26th, 2004 she became the first woman wanted by the federal government in connection with Al Qaeda when then Attorney General John Ashcroft and FBI Director Robert Mueller asked the public's help in finding her and six men suspected of links to Al Qaeda.
At that same time they warned, in advance of the Democratic and Republican National Conventions, that Al Qaeda was preparing to "hit the United States hard" that summer.
By then Siddiqui had been linked to an "ill conceived" and perhaps amateurish plot to "kill all living US presidents", according to sources from three federal agencies. One of those plots included a poison attack on the life of Jimmy Carter. By then she had already vanished from public view for about 16 months.
She has also been twice married; once to a nephew of 9-11 mastermind Khalid Sheik Mohammed.
Her name reportedly rolled from KSM's lips when he was captured and interrogated by US intelligence officers. She has also been linked to Adnan El Shukrijumah, a pilot and suspected al Qaeda member also on the Ashcroft-Mueller list.
Shukrijumah, Ashcroft noted, had once lived in Florida, had left the United States and had later attempted to re-enter the country using a variety of passports.
"We know that he has been involved in terrorist planning with senior al Qaeda leaders overseas and has scouted sites across America that might be vulnerable to terrorist attack," Ashcroft added.
By the time of Siddiqui's capture last month, she had become something of a cause celebre among some human rights activists who believe she was "disappeared" five years ago by the Pakistani government, perhaps at the request of the United States.
At a federal court hearing in Manhattan on Monday August 11th, the number of supporters who showed up required the US Marshals to move the Magistrate's Court proceeding to a larger courtroom and also open an overflow courtroom where spectators could listen to and watch the proceedings on closed circuit TV.