1. The time limit for the investigation stage of a criminal case shall be counted from the date when the case-handling organ files the case.
2. After the case is put on file, the case-handling organ shall conduct an investigation, collect and obtain evidence of the criminal suspect's guilt or innocence, and the crime is light or heavy.
3. Legal basis: Article 115th of the Criminal Procedure Law of People's Republic of China (PRC).
Second, what is the process of the investigation stage of criminal cases?
1. The public security organ may impose criminal detention on the flagrante delicto or major suspect. Detainees should be questioned within 24 hours after detention. A criminal suspect may hire a lawyer to provide him with legal advice, complaints and accusations after the first interrogation by the investigation organ or from the day when compulsory measures are taken. The entrusted lawyer has the right to know the charges charged by the criminal suspect from the investigation organ, to meet the criminal suspect in custody and to know the relevant information from the criminal suspect.
2. If the public security organ deems it necessary to arrest the detained person, it shall submit it to the people's procuratorate for examination and approval within three days after detention. Under special circumstances, the approval time can be extended by one to four days. For major suspects who commit crimes on the run, commit crimes many times or commit crimes in collusion, the time for submitting for examination and approval may be extended to 30 days. The people's procuratorate shall, within seven days after receiving the approval letter from the public security organ, make a decision on whether to approve or disapprove the arrest. If the people's procuratorate does not approve the arrest, the public security organ shall immediately release it after receiving the notice and promptly notify the people's procuratorate to execute it. Those who need to continue the investigation and meet the conditions of obtaining a guarantor pending trial or residential surveillance shall be granted a guarantor pending trial or residential surveillance according to law.
If the suspect is arrested, the lawyer hired can apply for bail pending trial.
4, the public security organs of the criminal suspect after the arrest of the investigation detention period shall not exceed two months. If the case is complicated and cannot be concluded at the expiration of the time limit, it may be extended for one month with the approval of the people's procuratorate at the next higher level.
5, the public security organs to investigate the end of the case, it should be clear about the facts of the crime, the evidence is true and sufficient, write a prosecution opinion, together with the case files and evidence, transferred to the people's procuratorate at the same level for examination and decision.
According to the provisions of the Criminal Procedure Law, the time limit for the investigation stage of a criminal case is calculated from the date when the case-handling organ files the case. After placing a case on file, the case-handling organ shall conduct an investigation to collect and obtain evidence of the criminal suspect's guilt or innocence, and the crime is light or heavy.