Greenville, MS – In Washington County Circuit Court, Marvin Titus, 44 yoa, was sentenced today following his May 20, 2015 conviction, District Attorney Dewayne Richardson announced.  Titus had been indicted by a Washington County grand jury for the charge of Murder as a Habitual Offender that stemmed from the January 18, 2013 shooting of Christopher Walls. After an hour and …