In this descriptive-analytical study, the duties of the bailiffs of justice in the evolving crimes and the challenges in this field have been investigated. The defenders of the bailiffs of justice throughout the history of Iran, under various titles, have enjoyed a special status in the system of government and justice, in light of the works left to help preserve and enforce the law, to discover the crime and prosecute the accused. In relation to the duties of the offenders in relation to the evident crimes, we must say: The bailiffs of justice shall inform the competent judicial authority of the outcome of their actions, if the referendum does not adequately cover the actions taken, it can be completed in this case, the agents are obliged, on the instructions of the judicial authority, to investigate and take legal action to detect the crime and arrest the offender, but they cannot keep the defendant back and if the defendant's detention is necessary for the completion of investigations in the evident crimes, the charge must be communicated to the defendant immediately in writing with reasons and for a maximum period of 24 hours, they can keep the defendant under surveillance, and at the earliest opportunity they should be informed to the judicial authority to make a legal decision. The judicial authority is responsible for providing arrest or release of the accused. Also, the inspection of homes, places and objects and the prosecution of persons in non-obvious cases should be subject to judicial authorization, although the conduct of investigations has generally been referred to the police by the judicial authority.
