Reservation Road

Reservation Road is a 2007 American drama film directed by Terry George and based on the book of the same title by John ... 

Two fathers' lives intersect when one of them is involved in a terrible and sudden hit-and-run car accident that leaves the other's son dead. In response, the two men (Joaquin Phoenix and Mark Ruffalo) react in unexpected ways as a reckoning looms in the near future.