IC 35-43-2-2
Criminal trespass
Sec. 2. (a) A person who:
(1) not having a contractual interest in the property, knowingly or intentionally enters the real property of another person after
having been denied entry by the other person or that person's agent;
(2) not having a contractual interest in the property, knowingly or intentionally refuses to leave the real property of another
person after having been asked to leave by the other person or that person's agent;
(3) accompanies another person in a vehicle, with knowledge that the other person knowingly or intentionally is exerting
unauthorized control over the vehicle;
(4) knowingly or intentionally interferes with the possession or use of the property of another person without the person's
consent;
commits criminal trespass, a Class A misdemeanor. However, the offense is a Class D felony if it is committed on a scientific
research facility, on school property, or on a school bus or the person has a prior unrelated conviction for an offense under this section concerning the same property.
Looks to me like it is a criminal offense in Indiana, so file a complaint and let the judge weigh it out...call the police each and every time they are on the roof or otherwise on your property...personally I would not go to extraordinary expense to prove their wrongs..use the law, that is why it is there