On April 19, 1995, a huge truck bomb destroyed a large part of the Alfred P. Murrah Federal Building in Oklahoma City ... killing 168 people, including 19 children. In a matter of days the FBI established that the bombing was the work of a conspiracy. The first conspirator arrested was Timothy McVeigh, a 27-year-old Army veteran. The second conspirator arrested was Terry Nichols. Oklahoma City," an extraordinarily well-researched book, asserts that the FBI investigation of the bombing was badly flawed and missed, or disregarded, evidence of a larger conspiracy. The authors, Andrew Gumbel and Roger Charles, are both highly regarded investigative reporters who have been immersed in this case for more than a decade. They were given access to vast amounts of material assembled by the defense teams, including 18,000 FBI witness interviews. The book ... outlines how federal prosecutors, eager to wrap up the McVeigh and Nichols cases, avoided raising questions about possible co-conspirators that the defense could use to confound a jury. Among the glaring gaps in the investigation was the failure of the FBI to attempt to match the more than 1,000 unidentified latent fingerprints found in the investigation. [And] almost all the eyewitnesses to the crime claimed that McVeigh was not alone. No fewer than 24 witnesses said that they saw McVeigh, just before and after the crime, with a man who could not have been ... Mr. Nichols. The FBI concluded that these witnesses had all been confused. Certainly eyewitness testimony can be unreliable, but 24 mistaken witnesses-and no accurate ones?