Tiahrt Amendment was introduced by Congressman Todd Tiahrt (R-KS) in 2003. The Tiahrt Amendment has forbidden the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) from releasing information from its firearm trace database to anyone other than a law enforcement agency or prosecutor in connection with a specific criminal investigation, and any data so released is deemed inadmissible in a civil lawsuit. The Tiahrt Amendment restricts access of state and local law enforcement authority to gun trace data, hindering municipal police departments' ability to track down sellers of illegal guns, to investigate gun trafficking patterns, and to make connections between individual gun-related crimes.



