The FBI gave its informants permission to break the law at least 5,658 times in a single year, according to newly disclosed documents that show just how often the nation's top law enforcement agency enlists criminals to help it battle crime. The U.S. Justice Department ordered the FBI to begin tracking crimes by its informants more than a decade ago, after the agency admitted that its agents had allowed Boston mobster James Whitey" Bulger to operate a brutal crime ring in exchange for information about the Mafia. The FBI submits that tally to top Justice Department officials each year, but has never before made it public. Agents authorized 15 crimes a day, on average, including everything from buying and selling illegal drugs to bribing government officials and plotting robberies. FBI officials have said in the past that permitting their informants - who are often criminals themselves - to break the law is an indispensable, if sometimes distasteful, part of investigating criminal organizations. USA TODAY obtained a copy of the FBI's 2011 report under the Freedom of Information Act. The report does not spell out what types of crimes its agents authorized, or how serious they were. It also did not include any information about crimes the bureau's sources were known to have committed without the government's permission. Crimes authorized by the FBI almost certainly make up a tiny fraction of the total number of offenses committed by informants for local, state and federal agencies each year.