Previously unseen footage shines a spotlight on Attorney General Garland’s duty to disclose evidence in possession of the government.Attorney General Garland, in the wake of the disclosures of footage from government cameras showing the “QAnon Shaman,” Jacob Chansley, being guided through the Capitol by uniformed police on January 6, 2021, has an obligation to bring, if he hasn’t done so already, the evidence to the attention of Chansley’s lawyers and the court. That is the opinion of one of America’s leading defense lawyers, Harvey Silverglate of Boston. Mr. Hoffman is an associate editor of the Sun, where he covers politics...