Cast For Gone Away

James, in the beiging of the movie meets with his old time friend, brad, played by casey affleck, James ends up running over brad's son by accident

the wife of james, kills herself at the end

Brad, his son dies, and seeks revenge on the killer, which is his friend james, worked with james for a few years in an office, but ran into drinking problems

former wife of brad, has custody of the kid that was killed

James's boss, he is also the new husband of brad's old wife, he is very close with the kid that died

the cop that helps brad find the killer