Crouched behind a dumpster in a St. Louis alley, Officer Steven Pinkerton heard gunshots. The “only issue in this case is identification of the defendant by Officer Steven Pinkerton,” the prosecutor said at Watkins’ trial. “All along, he’s racist,” Watkins said from the visitors’ room of supermax Jefferson City Correctional Center when told about Pinkerton’s history. At trial, Watkins’ public …