The purpose of this thesis is to study the criminal investigation process in the Pohuwato district police jurisdiction and to understand the factors that hinder the investigation of criminal acts of persecution in the Pohuwato district police. The method in this study uses empirical legal research that is direct research into the field. The results of this study are (1) The role of investigators in the investigation of criminal acts of persecution in the Pohuwato Regional Police Region starting from the reporting process to the submission of case files to the prosecutor's office. In the process, it still keeps the KUHAP and SOP rules based on Perkap No. 14 of 2012. (2) Factors hampering the process of investigation and investigation of acts of poaching in the Pohuwato Police Station Witness does not need a place, the witness does not want to provide information, the suspect is not located or assisted himself, Lack of Evidence The suggestion in this thesis is that it is often necessary to improve the quality of investigations through training and quality improvement so that investigators become more professional in carrying out their duties in accordance with Operational Standards in investigations and investigations.