Tom. Document everything! Include discriptions of the children if you don't know their names. Take photos of the damage. If you or a friend could videotape an event that would be excellent. Take your evidence and history of past events to a magistrate, city council member, DA some such and tell them that the police just blow the whole thing off. Demand action and keep going until you get action. If there is a TV broadcast station in your area tell them about it. They will love the angle that the police are non-responsive. Fight back. In this present day culture (moral relativism and no-fault behavior)a criminal can be just about any age.