A probable cause hearing is scheduled for two men charged in the fatal shooting of a University of Michigan medical student.  The preliminary hearing is scheduled for Friday in 15th District Court in Ann Arbor.  Twenty-one-year-old Shaquille Jones and 20-year-old Joei Jordan face open-murder and home invasion charges in Paul DeWolf's death. Authorities arrested them last month in South Carolina.  Jordan's hearing was initially scheduled for Thursday, but it was rescheduled to the same day as Jones' hearing.  A third suspect is jailed in Michigan on a bond violation in another case but hasn't been charged in DeWolf's killing.  DeWolf was found dead July 24 at an off-campus medical fraternity in Ann Arbor. The 25-year-old Schoolcraft native was attending Michigan on an Air Force scholarship.