(MEXICO)--  Convicted Hannibal murderer Calvin Duane Pettey is to be sentenced today.   A jury in June found Pettey guilty of first-degree murder in the 2010 killing of his fiancé, Sandra Fugate.    Pettey shot Fugate to death in the home they shared on Iowa Avenue in Hannibal  two days before they were to be married. Pettey’s girlfriend told authorities that he admitted to the killing.    The sentencing is set for 2 p.m.  before Judge Keith Sutherland.