Some of bin Laden family members were not even interviewed. From Bin Laden may have arranged family’s US exit – FBI docs:
Osama bin Laden may have chartered a plane that carried his family members and Saudi nationals out of the United States after the September 11, 2001 attacks, said FBI documents released Wednesday. The papers, obtained through the Freedom of Information Act, were made public by Judicial Watch, a Washington-based group that investigates government corruption.
One FBI document referred to a Ryan Air 727 airplane that departed Los Angeles International Airport on September 19, 2001, and was said to have carried Saudi nationals out of the United States.