The Electronic Frontier Foundation (EFF) studies seven years worth of FBI intelligence investigations from the Intelligence Oversight Board found via Freedom of Information Act requests and finds:
• Evidence of delays of 2.5 years, on average, between the occurrence of a violation and its eventual reporting to the Intelligence Oversight Board
• Reports of serious misconduct by FBI agents including lying in declarations to courts, using improper evidence to obtain grand jury subpoenas, and accessing password-protected files without a warrant
• Indications that the FBI may have committed upwards of 40,000 possible intelligence violations in the 9 years since 9/11
The full EFF study.
UPDATE: Jesse Walker already blogged this report in Morning Links a couple days ago.