The issue focused on the way prosecutors had handled some of the first trials in Ferguson after the shooting of Michael Brown by a white police officer there last year. Prosecutors had tried to prove Wilson had acted in self-defense in two cases but the jury rejected the charges. In one case jurors said the testimony in the witness box "was not credible." The judge ordered a new trial after that trial and one in court in St. Louis last month. In the latest trial, jurors convicted another defendant, Michael Brown's best