Assistant US Attorney General Lanny Breuer in December of 2012. Ramin Talaie/Getty Images hide caption toggle caption Ramin Talaie/Getty Images The Two-Way Lanny Breuer, Justice Dept.'s Criminal Division Chief, Says He Will Step Down January 30, 2013 Breuer's tenure as chief of the Justice Department's criminal division was marked by the scandal of "Fast and Furious" gun-walking operation and the biggest biggest criminal investigation in department history.