As reported in today's Washington Post,

The FBI illegally collected more than 2,000 U.S. telephone call records between 2002 and 2006 by invoking terrorism emergencies that did not exist or simply persuading phone companies to provide records, according to internal bureau memos and interviews. FBI officials issued approvals after the fact to justify their actions.

The records were obtained using post 9/11 "rules" that allowed the FBI to get phone records in the case of an "emergency."  The FBI was required to obtain authorization for the phone records after the fact, but according to the cases cited by the Washington Post, the authorization in many cases was never even asked for.

Sure has been a banner week for the FBI.