 Investigators say 22-year-old Marcus Antoine Jennings Jr. shot 23-year-old Kevon Ewing of Moundsview as the door of a Greenline train opened at Dale Street just before 11 p.m. on May 17th. Jennings is charged with murder along with his 18-year-old brother, Markel, who allegedly shot Ewing as he lay on the platform.