Wrongful case and arrest has been done to my father and FIR not provid

Two of my father’s friend got a foreigner in their taxi and took her to hotel. She herself got them the alcohol and took them in the room and did everything ( physical) with them. On that night, my father’s friend called my father and asked them to bring food for them, my father went there and gave them the food and came back. Now those two person took the foreigner for the trip but then in the middle of the trip they stole every penny that was with her. So she went to DHARMSHALA,HP,INDIA after that incident and lodged a case against those two person for theft and rape. Now when those two got arrested in delhi and they were on remand, they said that my father was involved too in this case so the police filed a case under section 376 against my father too. Now my father also went to tihar jail and the police people are telling us different things and not giving us FIR and my father is telling opposite things. Police people said that nothing could be done before 3 months.