I do not believe suing CMW will help the family find peace, but I applaud them in filing the motion to "freeze" any assets he may have at his disposal. If I were the family I may want to move away from that neighborhood as an example just for one. Being possibly overwhelmed and not being able to go to work to support themselves for who knows what period of time and so on.
What brings people peace, is different for every family. I can't begin to imagine how I would fine peace, if that happened to my daughter. Maybe, it doesn't bring peace. Perhaps, it helps them feel more justice. I support them doing whatever they feel is best for their family.