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But an unusual amount of post-trial activity has brought serious challenges to the candor of prosecutors, which Stevens’ lawyers are seizing on to ask Judge Sullivan to overturn the verdict.

First, a witness claimed he committed perjury and the government knew it. That was followed by an explosive complaint in which an FBI agent who worked on the case made allegations of widespread prosecutorial misconduct.

Special Agent Chad Joy said prosecutors purposely concealed evidence from the defense and that another agent, Mary Beth Kepner had an inappropriate personal relationship with star witness Bill Allen, a wealthy oil-magnate who gave Stevens the majority of gifts and renovations he was convicted of failing to disclose.