Police procedure is a set of protocols and practices that law enforcement officers must follow when carrying out their duties. DRAGNET is a term used to describe a coordinated effort by police to search for a criminal or suspects in a particular area. An ARREST is the act of apprehending a person and taking them into custody. A stakeout is a surveillance tactic where officers wait in a concealed location to observe a suspect or crime scene. A KETTLE is a tactic used by police to contain a large group of people in a small area. Finally, a DNA test is a scientific analysis of a person's genetic material to determine their identity.