Investigation is a series of investigator actions in terms of and according to the way regulated in the law to search for and collect evidence which with clear evidence about the criminal acts that occurred and to find the suspect.
At this level, the investigator will search for and collect evidence in specific legal proceedings so that the evidence can be accepted as valid evidence in court. The investigator has the authority to force other parties to provide evidence relating to the case. After the evidence of a complete event, the investigator will determine who the perpetrator of the criminal event.
The investigation conducted by investigator is supervised by prosecutor.