Investigations into Justice Department bias against conservatives begin in the U.S. House today. Representative Jim Jordan's Weaponization of Government Committee has the F.B.I. in its crosshairs. The author of a new book on the F.B.I.'s downfall has been called a legend at the bureau. Tom Baker was the first agent on the scene when President Ronald Reagan was shot in 1981, and he worked under many different F.B.I. directors over his 33-year career. With his book, The Fall of the FBI, Baker is one of the most senior figures to write that the bureau has become a "threat to democracy."