A detective is a police officer, whose duty is to detect criminals, by in-depth investigation of cases. When attempting to solve a crime, detectives conduct a criminal investigation that seeks all the facts about a crime to help determine the truth: what happened and who is responsible. This involves making a preliminary and final investigation. A detective’s task is to gather, organize, and use information about social behavior. To effectively complete that task a detective should possess certain characteristics: intellectual, psychological, and physical. Studies were conducted on the importance and efficiency of the criminal investigation system, and on th