Federal prosecutors are beefing up their case against Web radio talk show host Harold “Hal” Turner, charged with encouraging listeners to murder three federal appellate judges. In Turner’s retrial, which starts next week in Brooklyn, N.Y., prosecutors plan to call those judges to the stand.

Last week the prosecutors, who work in the U.S. Attorney’s Office in Chicago, overcame objections from Turner’s lawyer, Michael Orozco, and won permission to have the three judges from the 7th U.S. Circuit Court of Appeals in Chicago provide testimony, according to documents filed in the case. The targets of Turner’s vitriol were Chief Judge Frank Easterbrook, Judge Richard Posner and Judge William Bauer, a former U.S. Attorney in Chicago.