Informant in plot against Whitmer indicted on weapons charges Indictment could impact trial against men suspected domestic terrorism Tags: A lot of the evidence in the trial was provided by key FBI informants. READ: RELATED: Ad The FBI has named one of their key informants as Steven Robeson from Wisconsin. He has also indicted for possessing a .50 caliber rifle as a felon. By naming him, his past has been dug up. “You never want to start a case where the defense is able to point a finger at somebody on your side,” said Local 4 legal analyst Neil Rockind. Attorneys for the men will argue the men were just talking about the plot and the FBI’s own informants helped train the men, allegedly pushing the plot forward.