BOSTON — Eight months after ex-NFL star Aaron Hernandez hanged himself in prison, a new book by bestselling author James Patterson is reviving unanswered questions. Patterson spoke with The Associated Press on Friday about what he calls “the most fascinating, complicated and troubling crime story of our times.” Hernandez, a former standout tight end for the New England Patriots, was found hanging by a bedsheet in his cell on April 19, hours before his ex-teammates were due to visit the White House to celebrate their Super …