In order to assist a prosecutor in criminal investigation, the law manifestly specifies the following offices as the facilitating bodies so as to ensure effective exercise of the prosecutorial function.

1. Judicial police officer:
   
   • Those who has the duty to assist a prosecutor in investigation a crime are:
     
     • county magistrate or mayor.
     • the head of a police department, commissioner of police or commissioner of public safety.
     • military police officer
   • Those who shall follow the instructions of a prosecutor in investigating a crime are:
     
     • Commissioned police officers.
     • Military police officers or non-commissioned officers.
     • Persons who are authorized to exercise the duties of a judicial police officer in specific matters. 
2. Judicial policemen:
   Those who shall follow the order of a prosecutor in investigating a crime are:
   
   • policemen
   • military policemen
   • persons who are authorized to exercise the duties of judicial policemen in specific matters.