[twisted]

Well as far as the fullest extent of the law...once you have the proper proof, of preferablly more then one event, and police documentation of each event as you report it to the police.
It doesn't take more then a couple of times before it becomes a whole barrel of trouble for him and his mom, and or dad. The part that really does the damage is the fact that your daughter has a handicap, which means that he can be found to be dicriminating towards a diabled person, which is worse the if it was against race, age, sexual orientation.
The kid can get in some pretty decent rouble for doing what he is doing, but with your daughter living there, he can get seriously reamed if it was approached the right way in court.