The title was something like A Mother Obcessed or a Mother Obcession, a little boy get hit by a drunk driver on his way home from school and the driver drags him a ways. The mother become obcessed with finding who di this. The man leaves near by and is haunted by this and the mother eventually finds out who did it. I can't remember if the boy lives or not but the mom was relentless on finding who did it.
