1. It will be ideal for you to audio tape his abuses on your parents, if possible,
2. This will serve as evidence to bring him to books,
3. However, your parents should file police complaints against him and also for police protection
4. They should send their complaints by speed post under copy to local S.p.,
5. After that they can file an application before District Judge praying for direction up on the police to investigate and act based on your complaint and also for police protection,
6. If police still fails to act, you can file a W.P. before the High Court against police inaction.