Congressional Investigators Target FBI Over Fast and Furious – Congressional investigators probing the botched federal gun-trafficking program known as Fast and Furious are now setting their sights on the FBI.  Rep. Darrell Issa, R-Cali., chairman of the House Oversight and Government Reform Committee, and Sen. Charles Grassley, R-Iowa, the ranking member on the Judiciary Committee, sent a letter Thursday to FBI Director Robert Mueller demanding answers about the guns found at the murder scene of Border Patrol Agent Brian Terry.