Where a criminal defendant chose to testify, he opened himself up to cross-examination and impeachment. As a result, the U.S. District Court did not err in allowing the government to impeach the defendant. The 7th U.S. Circuit Court of Appeals affirmed a decision by U.S. District Judge William T. Lawrence, Southern District of Indiana. William Boswell was indicted by a grand jury in 2012, charged with being a felon in possession of two firearms. The incident that led to the indictment occurred in January 2011. In …