Because they can……
Check it out:
The head investigator charged with overseeing the Department of Justice testified Tuesday that various government agencies have repeatedly stymied his investigation efforts, and have done so in direct violation of federal law.
Michael E. Horowitz, Inspector General of the Department of Justice, was testifying before the House Judiciary Committee hearing on investigative access to government information.
“Since 2010 and 2011,” he said. “The FBI and some other Department components have not read Section 6(a) of the IG Act as giving my Office access to all records in their possession and therefore have refused our requests for various types of Department records. As a result, a number of our reviews have been significantly impeded.”