 The OCP processes victim complaints; conducts the preliminary investigations (first investigatory stage); and issues Introductory Submissions to the Office of Co-Investigating Judges where there is sufficient evidence of crimes within the jurisdiction of the ECCC having been committed.Introductory Submissions set out the facts, applicable law, alleged offences, and person(s) to be investigated.The OCP also participates in the judicial investigations (second investigatory stage), filing Supplementary Submissions as necessary when new facts come to light and original allegations require additions or amendments.