Criminal investigation guided by procuratorial work plays an important role in the reform of prosecution system. It is also a work system ,according to the necessity of accusing crimes, in which prosecution guides police to collect evidence and fix evidence by getting involved in Criminal investigation ,and carries out legal supervision aimed at criminal investigation. The system is valuable because prosecutors can guide policemen on the thought of evidence,and is based on the power of prosecution and the power of supervision .In addition,this paper goes further into the selection of pattern and specific construction,and so on.
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