What to do after chargesheet filed?

Sir, I need an advice. It's an urgent issue!! My father doing govt service in up state govt in revenue deptt. In 1995 there was one suspended employee start getting his salary by giving bribe or settlement with office seniors. He started doing job regularly. This remain continue for several years. Seniors got transferred to another place. Then after next senior who used to make salary without checking his past suspension case, normally used to give salary. Later when my father after 15 years of this issue, my father transferred to that place and similarly my father started giving salary as it was continued since 15 years. After my father transferred to another location. Later at the time of retirement that suspended defaulter applied for pension. At this time govt came to know of this fraud. FIR issued against him but all those who gave salary to him also got in notice. All seniors except my father n two others settled the issues with CID n their names dropped from the case. My father got anticipatory bail til chargesheet filed. Now chargesheet filed by police and warrant issued in name of my father. My father name was not in FIR and he is just co-accused. Now pls advice sir. Next hearing is on 11 th july in district court. Pls advice what action to be taken next. We don't want to go in custody in this false case where real accused are free and innocent is suffering.. the case is comes under criminal law under section 420/467/468/471. Thanks hope you will reply.