Even for being a monster, he does not fully forfit his parental rights so I don't think you can be certain that he'll never have access to his children. In 2011 he could argue that he's rehabilitated and ask for visitation. He may be granted supervised visitation meaning he'd see the children in the safe environment of a child welfare professional's office.

File for a simple divorce with sole custody and no visitation privilidges for the father. Nothing else you do now will affect your options for dealing with this in 2011.