Normally a Criminal Trial has to travel through main stages from the lodging of F.I.R. till its judgment, they are as under :-
1. FIR :- Any person can launch prosecution against the person committing any legal wrong. A complaint can be lodged orally or reduced in to writing before the police station within whose jurisdiction an offence is committed. The Police Officer in-charge of the police station considers the complaint and registered
2. Inquiry and Investigation :- An police officer after the receipt of the complaint under section 154 of the Code of Criminal Procedure, and matter is taken up for the investigation.
2-A. If the Police Officer in-charge does not found any material in the complaint then he can register the complaint under section 155(2) of Code of Criminal Procedure and issues a receipt thereof to the complainant.
3. Upon registering the F.I.R. and during investigation, a Police Officer can arrest the suspect and took him for remand. Soon after the arrest the accused has to be produced before the Magistrate within 24 hours from the time of his arrest, for authorizing further detention as contemplated under section 57 of Code of Criminal Procedure.
4. The Police Officer in-charge can ask for Police Custody of the accused under section 167 of Code of Criminal Procedure if the investigation cannot be completed within 24 hours. (See Sec 57 of Cr.P.C.)
5. The magistrate considering the application can grant Police Custody to the accused which shall not be more than fifteen days in the whole.
5-A. If the magistrate does not fit it proper to grant police custody then the accused is taken in Magisterial Custody. (See Sec 167 of Cr.P.C.)
6. Soon after the MCR, an accused can apply for grant of Bail, within the provisions of section 436, 437 and 439 of Code of Criminal Procedure.
7. During the investigation, a police officer in-charge can search, seize the material from the possession of accused, or elsewhere kept by the accused. ( See Section 27 of Evidence Act )
8. After the completion of investigation, if the police officer found incriminating substance and prima facie case is made out, then he put up charge sheet against the accused. If the offence is punishable with death, life or not less than 10 years, then charge sheet is to be filed within 90 days. Whereas the offence is punishable less than 10 years then charge sheet is to be filed within 60 days. ( See Section 167 (2) (a) (i) and (ii) of Cr.P.C.
8-A. Upon receipt of charge sheet under section 173 of Code of Criminal Procedure, the court can either accept the charge sheet and put the accused to trial or reject the charge sheet and discharge the accused.
8-B. If upon the completion of investigation, the police officer does not found any prima facie case, then he can file a final report requesting a discharge of accused.
8-C. Upon receipt of the final report, the magistrate can either direct the police officer to re-investigate and file report or can issue notice to the complainant for hearing upon the final report requesting the discharge of accused.
8-D. If the complainant does not satisfy with the final report requesting discharge of accused, he can request for treating the same as protest petition and try the accused independently.
9. On acceptance of charge sheet, the accused has to take necessary bail from the court and mater is posted for plea or charge as the case may be. Whenever the offence is punishable with two years of punishment, then such cases are called as summons case and tried as summary trial within the exception of section 260 of Cr.P.C. and the rest of the matters are tried as summons case. (See Section 239, 240 and 251 of Cr.P.C.)
10. On complying section 251 or 240 as the case may be, the matter is posted for evidence of the prosecution witness.