Shocking Blue(2010)

William, Jack and Chris have been friends for as long as they can remember - until that day in April when Jack ends up under the wheels of a tractor, his body crushed, William at the wheel. Suddenly nothing is left of the boys' friendship. Chris tries his best, but William is one lump of impenetrable rock, secretly wondering if the events of the night before, when Jack went off with fifteen-year old Marianne, had anything to do with the accident...