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 Burnham Schwartz, who, along with George, adapted the novel for the screenplay. The film, starring Joaquin Phoenix and Mark Ruffalo, deals with the aftermath of a fatal car crash. It was released to theaters on October 19, 2007.

Dwight Arno Ruffalo is an attorney who is divorced from his wife Ruth Sorvino. Ruth controls custody of their son Lucas Alderson while Dwight maintains visitation rights. Dwight and Lucas are at a baseball game when Ruth calls, informing Dwight that he is late returning their son home. Dwight drives Lucas home in a hurry, thinking he might otherwise forfeit his visitation privileges. When he loses control of his vehicle, he strikes a young boy, Josh Learner Curley, who is standing by the roadside.Aware that he has struck the boy, Dwight decides to flee the scene. He further lies to Lucas, who has a minor injury from the incident, saying that they had collided with a tree log. Dwight later hears on a newscast that Josh died in the collision. Subsequently, he tries to cover up the evidence which implicates him in the hitandrun. After the initial shock of losing Josh, Grace Connelly gradually tries to get on with life, but her husband Ethan Phoenix, is obsessed with finding out who killed their son and frustrated with the lack of progress the police are making in their investigation. Ethan eventually decides to hire a lawyer, who oddly enough turns out to be Dwight. ........

Source: Wikipedia