Caleb's mommy and Waitone,
I am sure that you know this, but whatever you do, DO NOT entertain or speak about desires for vengence. This dirtbags life is not worth ruining yours again. Hopefully the justice that you were denied in the courts will visit him in prison. If not, and he somehow gets out you could allways post flyers with his picture and Caleb's picture around his neighborhood, place of business, local markets. That should make him VERY popular. Include no threats, simply inform the public to his presence. They do it with sex offenders, why not muderers?
Of course, the healthyest (and hardest) thing to do would be to put this behind you and get on with your lives. I feel truely sorry for you and your family, and I know that justice will be done either by man or God.