By: Addison Wylie A tragically troublesome story involving a 14-year-old executing a fellow eighth grader by aiming and shooting a gun at their head during class seems about as open-and-shut as cases come.  However, filmmaker Marta Cunningham explores the event from every angle to get every side of the story that she can in Valentine Road. It isn’t because she’s suspicious and smelling something fishy in the events leading up to this kill.  As a…