The plaque honoring the "G-man," who rose to fame after successfully prosecuting gangster Al Capone in 1931, was taken from the police museum on the first floor of the Justice Center, the Cleveland Plain Dealer reported Friday.
Visitors to the museum, which is operated by the Cleveland Police Historical Society, do not have to go through security checks.
The plaque, which has an estimated worth of $225, was not reporting missing at first because museum staff thought it might have been leant out. A police spokesman said a suspect could be charged with felony breaking and entering.
Caroline Berg Eriksen: Soccer player's wife triggers debate with post-birth selfie
Man behind Doritos Locos Tacos passed away on Thanksgiving