On March 1, 2013, Milwaukee Country prosecutors shut down the long running "John Doe" probe into corruption in Scott Walker's office during the time he served as Milwaukee County Executive. Six people were charged and convicted, including three former Walker staff, but no charges were brought against Walker. Milwaukee County District Attorney John Chisholm issued a brief, telling statement: "After a review of the John Doe evidence, I am satisfied that all charges that are supported by proof beyond a reasonable doubt have now been brought and concluded."