Reservation Road (2007) on Netflix

Plot summary

Ethan Learner, a college professor, sits with his wife Grace and daughter Emma at a recital where ten-year-old Josh plays the cello. Driving home, the family stops for gas on Reservation Road, and Josh is killed by a car that does not stop. Dwight Arno is an attorney in the middle of a divorce, with visitation rights to his son Lucas. Late in returning Lucas from a Red Sox game, after a call from Lucas's mother Ruth, Dwight loses control of his car and hits a boy at the roadside. He drives on and tells Lucas they struck a tree log. Dwight hears on the news that Josh has died, and moves to cover the evidence. A police investigation follows, and Ethan is set on finding the driver.