Administration of justice, with particular reference to the criminal law, is a compendious term that stands for all the complexes of activity that operate to bring the substantive law of crime to bear, or to keep it from coming to bear, on persons who are suspected of having committed crimes. It refers to the rules of law that govern the detection, investigation, apprehension, interviewing and trial of persons suspected of crime and those persons whose responsibility it is to work within these rules.