And the Washington Post is reporting the FBI has conducted clandestine surveillance on some U.S. residents for as long as 18 months at a time without proper paperwork or oversight. Government records indicate that the FBI has investigated hundreds of potential violations related to its use of secret surveillance operations. In one case, FBI agents kept an unidentified target under surveillance for at least five years — including more than 15 months without notifying Justice Department lawyers after the subject had moved from New York to Detroit. In other cases, the Post reports agents obtained e-mails after a warrant expired, seized bank records without proper authority and conducted an improper “unconsented physical search.”