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The report also said this about Bayoumi: 'We have seen no credible evidence that he believed in violent extremism, or knowingly aided extremist groups.'
The man who's been credited at the mastermind of the attacks, Khalid Sheikh Mohammed, told authorities during an interrogation that he didn't know Bayoumi.
Following his arrest by British authorities at the request of the US, Bayoumi was released back to Saudi Arabia because he couldn't be held on any charges besides visa fraud.
The 9/11 Commission and the FBI interviewed Bayoumi after the attacks, according to the commission's report.
As of 2004, Bayoumi, described as a devout Muslim, was living in Saudi Arabia and 'well aware of his notoriety.'
photo) Pictured: Omar al-Bayoumi is out in front of the Capitol Building. He goes on to detail its entrances and exits, as well as where security guards are posted