Public securityPublic security or public safety is the prevention of and protection from events that could endanger the safety and security of the public from significant danger, injury, or property damage. It is often conducted by a state government to ensure the protection of citizens, persons in their territory, organizations, and institutions against threats to their well-being, survival, and prosperity.
Circumstantial evidenceCircumstantial evidence is evidence that relies on an inference to connect it to a conclusion of fact—such as a fingerprint at the scene of a crime. By contrast, direct evidence supports the truth of an assertion directly—i.e., without need for any additional evidence or inference. On its own, circumstantial evidence allows for more than one explanation. Different pieces of circumstantial evidence may be required, so that each corroborates the conclusions drawn from the others.
LuminolLuminol (C8H7N3O2) is a chemical that exhibits chemiluminescence, with a blue glow, when mixed with an appropriate oxidizing agent. Luminol is a white-to-pale-yellow crystalline solid that is soluble in most polar organic solvents, but insoluble in water. Forensic investigators use luminol to detect trace amounts of blood at crime scenes, as it reacts with the iron in hemoglobin. Biologists use it in cellular assays to detect copper, iron, cyanides, as well as specific proteins via western blotting.
Serial killerA serial killer is typically a person who murders three or more persons, with the murders taking place over more than a month and including a significant period of time between them. While most authorities set a threshold of three murders, others extend it to four or lessen it to two. Psychological gratification is the usual motive for serial killing, and many serial murders involve sexual contact with the victim.
Forensic psychologyForensic psychology is the practice of psychology applied to the law. Forensic psychology is the application of scientific knowledge and methods to help answer legal questions arising in criminal, civil, contractual, or other judicial proceedings. Forensic psychology includes research on various psychology-law topics, such as jury selection, reducing systemic racism in criminal law, eyewitness testimony, evaluating competency to stand trial, or assessing military veterans for service-connected disability compensation.
Crime preventionCrime prevention is the attempt to reduce and deter crime and criminals. It is applied specifically to efforts made by governments to reduce crime, enforce the law, and maintain criminal justice. Criminologists, commissions, and research bodies such as the World Health Organization, United Nations, the United States National Research Council, the UK Audit Commission have analyzed their and others' research on what lowers rates of interpersonal crime.
Covert operationA covert operation or undercover operation is a military or police operation involving a covert agent or troops acting under an assumed cover to conceal the identity of the party responsible. Some of the covert operations are also clandestine operations which are performed in secret and meant to stay secret, though many are not. Covert operations aim to fulfill their mission objectives without anyone knowing who sponsored or carried out the operation.
EnforcementEnforcement is the proper execution of the process of ensuring compliance with laws, regulations, rules, standards, and social norms. Governments attempt to effectuate successful implementation of policies by enforcing laws and regulations. Enactment refers to application of a law or regulation, or carrying out of an executive or judicial order. Enforcement serves a number of functions; the enforcement of social norms can ensure conformity within insular communities, the enforcements of laws can maximize social benefits and protect the public interest, and enforcement may also serve the self-interest of the institutions that oversee enforcement.
Inspector generalAn inspector general is an investigative official in a civil or military organization. The plural of the term is "inspectors general". The Inspector-General of Intelligence and Security (Australia) (IGIS) is an independent statutory office holder who reviews the activities of the six Australian intelligence agencies under IGIS jurisdiction. The Inspector-General of the Australian Defence Force conducts internal reviews of administrative action, investigates Service Police professional standards breaches and other significant incidents including Service deaths, and reviews and audits the operation of the military justice system independently of the chain of command.
