Advise on filing case in court

Sir, I have given complaint to SP against in-laws for Money extortion and threatens and Blackmailing and DSP forwarded to SHO for Investigation. Later I filed RTI for status of the complainat. I have received the Negative reply saying all allegations false. I want to file case in court . Please advsie Is it possible to file case in Court without transferring case to POLICE for investigation If so under which section we can file case in court. please advsie.Thanks for urt time