Wichita ? Court documents show a federal agency conducting an undercover firearms investigation set up a bogus Wichita pawn shop called “Bandit Trading” in a yearlong operation that ensnared 67 defendants

Defense attorneys contend the Bureau of Alcohol, Tobacco, Firearms and Explosives paid a “de facto informant” to solicit others to engage in criminal activity and may have helped the agency entrap their clients.

Details of the sting emerged this week as defense lawyers seek to force the U.S. attorney’s office to turn over copies of surveillance videos captured by at least four video cameras at the bogus pawn shop.

The U.S. attorney’s office says prosecutors are preparing a written response and will present arguments in court.

The operation was aimed at taking guns away from convicted felons.