police not registering case

my father who is handicapped is beaten brutually by 8 people(including three ladies) and is serious and admitted in ICU ward of heritage hospital.firstly the police did not want to register a case but after calling to dGP HQ up the fir is registered. after registering fir my son who got head injury in saving his father got a call from village head that take 3 lakh rupees and take the case back when we refused to take the case back the police register a case against my son and nephew stating that my son and nephew has beaten them entering in their house and a strong case is registered on us, on the other side my husband who got injury on 10 places on his body and his finger bone and forehead bone is broken at two place but still a simple case of fighting is registered. on the other side the persons of opposite side has made forge medical certifiacte showing that their hand is broken and they have got head injury but in real they have not got any injury. before this accident my father has given a lot of application to the police in last one year but no action is taken against the accused till the date.