Criminal matters involving the police
In matters involving offences suspected to have been committed by police officers, the prosecutor handles the case from the pre-trial investigation stage all the way to the court proceedings. When a police officer is the subject of a criminal investigation, the prosecutor will exceptionally act as the head of the investigation during pre-trial investigation unlike a pre-trial investigation authority as in other criminal matters. If the offence suspected to have been committed by a police officer was committed off duty, however, the prosecutor may at his or her discretion allow a pre-trial investigation authority to conduct the pre-trial investigation.
Nationwide, around 20 specially trained prosecutors act as heads of the investigation in criminal matters involving the police. A prosecutor acting as the head of the investigation will not continue handling the case after the pre-trial investigation; the consideration of charges is carried out by a different prosecutor.