Review of the FBI's Use of Pen Register and Trap and Trace Devices Under the Foreign Intelligence Surveillance Act in 2007 through 2009: Executive Summary [open pdf - 1MB]
Taken from the Executive Summary: "This Executive Summary provides a brief overview of the results of the Department of Justice (Department or DOJ) Office of the Inspector General's (OIG) review of the Federal Bureau of Investigation's (FBI) use of pen registers and trap and trace devices under the Foreign Intelligence Surveillance Act (FISA) during calendar years 2007 through 2009. We completed a draft of this report in February 2014. At that time, we provided the draft report to the Department, the FBI, and the Intelligence Community to conduct factual accuracy and classification reviews. In May 2014, we circulated an updated draft report that reflected minor revisions made in response to the factual accuracy comments we received. We did not receive the final results of the classification reviews until April 2015. We provided the full classified version of this report to DOJ leadership offices, the FBI, the Office of the Director of National Intelligence, and appropriately cleared members of the relevant congressional oversight and intelligence committees."
U.S. Department of Justice, Office of the Inspector General: https://oig.justice.gov/