Thanks to a disagreement between the FBI and the Bureau of Alcohol Tobacco Firearms and Explosives (ATF), more than 2,000 guns were purchased in the past 15 years by people the FBI said should not have had them, according to a new report from the Office of Inspector General. This new report, which uncovered a loophole through which some of those deemed unfit to own firearms by the FBI can purchase them, puts a new scrutiny on the current laws, and how they're enforced. The FBI is responsible for running background checks on those purchasing guns. If the agency finds those buyers unfit, the responsibility to retrieve them falls on the ATF. But the two federal agencies disagree on who qualifies as a fugitive from justice," a label that prohibits prospective buyers from acquiring firearms, USA Today reports. While the FBI has considered anyone with an outstanding warrant to fall under the category, the ATF argues that prospective gun owners should be allowed to purchase firearms in the state where they have a warrant, but not in other states. The FBI sought to clarify the discrepancy by bringing the issue before the Justice Department's Office of Legal Counsel. There, the agencies received "informal advice." When the FBI requested a more formal ruling two years later, the counsel failed to render a decision, allowing the issue to persist some six years later. The report called for clarification on the "fugitive of justice" discrepancy to ensure proper enforcement of the law.