..."full time FBI operative"? In what capacity? As an informer, undercover source or as an actual FBI agent?
Ali Mohammed worked as an FBI informer and close undercover source for the FBI. He would report to the FBI about his overseas travel and what he also was doing in the US. This was reported in the Sacrmento Bee in 1998 (actual name of one of Ali's FBI handler given in the article).
Former CIA and State Department counter terrorism official LC Johnson (now a consultant for Fox News)also testified before COngress in 2001 after 9/11 about Ali Mohammed's role for the FBI. I saw LC Johnsons testimony on CSPAN. Johnson claimed in his testimony that the FBI and CIA lost track of and was "double crossed" by Ali Mohammed.