Custody of my dughter

I am an NRI, my daughter has come to know about the illicit relationship of her mother, and she is no longer interested to stay with her. Her mother divorced me in the year 2016 . My daughter was staying with her mother since 2005. My daughter claims that on a regular basis she is physically and mentally tortured by her mother and at times she is not even provided food . In this regard my daughter has already filed a General Diary with the local police station. In the diary she has also expressed her apprehension that her mother may harm her more in the future which can also result in loss of her life. My daughter now wants to come over to my parents ( her grandparents) and continue her education from their house. However, my parents are apprehensive that if my daughter comes over, myself or they may be harassed by the police which can result in social stigma. My daughter is 17 years old. We are filing a custody case on her behalf but my daughter wants to come over even before the case is filed. Please suggest