The Federal Bureau of Investigation's Compliance with the Attorney General's Investigative Guidelines, released to the public on September 14, 2005 [report revealing that federal agents frequently violate the FBI's guidelines for dealing with confidential informants]. Excerpt:
We found that the FBI's compliance with each of the four Investigative Guidelines differed considerably by Guideline and field office. The most significant problems were failures to comply with the Confidential Informant Guidelines. For example, we identified one or more Guidelines violations in 87 percent of the confidential informant files we examined. By contrast, we found approximately 90 percent of the undercover operations and consensual monitoring files we reviewed contained no authorization-related Guidelines deficiencies.
Read the full text of the report here [PDF]. Reported in JURIST's Paper Chase here.