Jamal al-Fadl, born in Sudan, was an early member of al-Qaeda, who, in 1996, was a "walk-in" to U.S intelligence. He testified in the 2001 trial of defendants for the 1998 bombings of U.S. Embassies in Africa,  and is now in the U.S. Witness Protection Program.
Dissatisfied with his compensation, he was reported to have stolen USD $110,000 from al-Qaeda, and, while Osama bin Laden offered forgiveness if he returned the money, he decided to leave Sudan.  He came to a U.S. Embassy, variously reported to be in Nigeria or Eritrea,  and offered information.