Harasment by Son to his parents

Hi Ajay , This is with regards to my elder brother who is married and physically assaults my parents every now and then over the property . Currently, My parents have no one to take care of them except my elder brother as I'm staying outside country after marriage. We are of 2 siblings , we have 1 house and 2 plot in the name of my mother . With affection (back then) mom gave 1house and 1 plot to my brother and now my brother is no longer willing to keep them in their house . Everytime he treats them(including myself) as if my parents are staying at his home and if I raise my voice over the phone and talk valid points he physically beats my mom (This harasses me mentally ). My mom and father are so soft and they think 1000 times to reach police instead they face this very often. He uses abusive words to my parents and now my mom wants to re-register the property to her name and wants to file a complaint against him which I feel it's fair move . Can we re-register the property to my mother's name ? If so, Do we require the signature of my brother? Also,Please suggest me the procedure to file a police complaint against my brother. Awaiting for your quick response Sahana