CHICAGO (AP) — An FBI special agent says he hopes to send a rope that two bank robbers used to escape from a downtown Chicago lockup to be displayed at the FBI Education Center in Washington.

The FBI and the Federal Bureau of Prisons haven’t said if anyone was disciplined after Joseph Banks and Kenneth Conley escaped in December 2012. Both men were recaptured within two weeks and are serving prison time.

Agent Timothy E. Bacha tells the Chicago Sun-Times that he also wants to send concrete and a metal bar from the cell that housed the pair. Bacha says he doesn’t have clearance to send all the materials but he hopes to soon. He has given other pieces of rope from the escape to Chicago’s Metropolitan Correctional Center for training.