HARARE – Vice President Constantino Chiwenga will take the witness stand on December 7 in his ex-wife’s attempted murder trial. Former deputy health minister John Mangwiro was finally stood down as a witness on Monday. Former model Marry Mubaiwa denies attempted murder. The National Prosecuting Authority (NPA) alleges that Mubaiwa attempted to kill Chiwenga by plugging off life supporting devices…