A detective is an investigator, usually a member of a law enforcement agency. They often collect information to solve crimes by talking to witnesses and informants, collecting physical evidence, or searching records in databases. This leads them to arrest criminals and enable them to be convicted in court. A detective may work for the police or privately.
Special Branch is a label customarily used to identify units responsible for matters of national security and intelligence in British, Commonwealth, Irish, and other police forces. A Special Branch unit acquires and develops intelligence, usually of a political or sensitive nature, and conducts investigations to protect the State from perceived threats of subversion, particularly terrorism and other extremist political activity.
Special Investigation Branch (SIB) was the name given to the detective branches of all three British military police arms: the Royal Navy Police, Royal Military Police and Royal Air Force Police. It was most closely associated with the Royal Military Police, which had the largest SIB. SIB investigators usually operated in plain clothes, although they did wear uniforms when serving overseas. Members were usually senior non-commissioned officers (sergeants or petty officers or above) or commissioned officers, although the Royal Air Force SIB was open to corporals and Acting Corporals. In December 2022, the new tri-service Defence Serious Crime Unit replaced all three service SIBs, which were disbanded.
The National Police Agency is the central coordinating law enforcement agency of the Japanese police system. Unlike national police in other countries, the NPA does not have any operational units of its own aside from the Imperial Guard; rather, it is responsible for supervising Japan's 47 prefectural police departments and determining their general standards and policies, though it can command police agencies under it in national emergencies or large-scale disasters. It is under the National Public Safety Commission of the Cabinet Office.
Chief superintendent is a senior rank in police forces, especially in those organised on the British model.
Inspector, also police inspector or inspector of police, is a police rank. The rank or position varies in seniority depending on the organization that uses it.
Superintendent (Supt) is a rank in the British police and in most English-speaking Commonwealth nations. In many Commonwealth countries, the full version is superintendent of police (SP). The rank is also used in most British Overseas Territories and in many former British colonies. In some countries, such as Italy, the rank of superintendent is a low rank.
Divisional detective inspector (DDI), also known as first class detective inspector, was a rank in the Criminal Investigation Department of London's Metropolitan Police, equivalent to sub-divisional inspector in the uniformed branch. It was senior to the rank of detective inspector and junior to the rank of detective chief inspector.
The Royal Cayman Islands Police Service (RCIPS) is the standing police force of the British Overseas Territory of the Cayman Islands. The police force was formed in 1907 and currently (2009) stands at 343 enlisted officers, tasked with tackling Crime in the Cayman Islands.
The Royal Falkland Islands Police (RFIP) is the territorial police force responsible for law enforcement within the Falkland Islands. The current Chief Police Officer is Superintendent Barry Thacker. The Falkland Islands Police Force was granted the "Royal" prefix by Queen Elizabeth II on 1 January 1992.
Sri Lanka Police is the civilian national police force of the Democratic Socialist Republic of Sri Lanka. The police force is responsible for enforcing criminal and traffic law, enhancing public safety, maintaining order and keeping the peace throughout Sri Lanka. The police force consists of 43 Territorial Divisions, 67 Functional Divisions, 432 Police Stations with more than 84,000 people. The professional head of the police is the Inspector General of Police who reports to the Minister of Law and Order as well as the National Police Commission. The current Inspector General of Police (Acting) is Deshabandu Tennakoon.
The Specialist Investigation Department is a branch of the Criminal Investigation Department of a British police force which investigates crimes such as murder and sexual offences supplying specially trained officers to monitor known ex-offenders who have a history of sex offences. This unit could be considered the same as Area Major Incident Pool of the Metropolitan Police Service. The Specialist Investigation Officers use the prefix "Detective" in front of their actual police rank. The team also responds to major investigations such as murder when divisional teams can not cope with the sheer amount of work.
The Paedophile Unit is a branch of the Metropolitan Police Service's Child Abuse Investigation Command, based at Scotland Yard in London, England. It operates against the manufacture and distribution of child pornography, online child grooming, and "predatory paedophiles online", and organised crime associated with these.
Chief inspector is a rank used in police forces which follow the British model. In countries outside Britain, it is sometimes referred to as chief inspector of police (CIP).
A Crime Investigation Department (CID) or Crime Branch is a branch of the state police departments of India responsible for the investigation of crime, based on the Criminal Investigation Departments of British police forces. It's the specialised investigation wing of the state police, and headed by an officer of the rank of Director General of Police or Additional Director General of Police (ADGP).
The Garda National Economic Crime Bureau – informally known as the Fraud Squad – is a specialised division of Ireland's national police force, the Garda Síochána, that investigates economic crimes. The Bureau operates as part of the Garda Special Crime Operations branch and works alongside other sections of the force, as well as the external Office of the Director of Corporate Enforcement (ODCE), an agency tasked with investigating white-collar crime. The Economic Crime Bureau is responsible for the investigation of serious financial fraud and corruption. It was established in April 1996 and is based at Harcourt Square, Dublin 2. The GNECB is headed by an officer of Detective Chief Superintendent rank, who reports to the Assistant Commissioner of Special Crime Operations.
The Criminal Investigation Department (CID) is one of the many departments under the Singapore Police Force for premier investigation and staff authority for criminal investigation matters within the Singapore Police Force.
Special Investigation Teams (SIT) are tactical detective units of Japanese prefectural police forces. Special Investigation Teams are maintained by prefectural police headquarters (PPH) and are trained to handle critical incidents including criminal investigation and tactical operations.
In the law enforcement system in Japan, prefectural police are prefecture-level law enforcement agencies responsible for policing, law enforcement, and public security within their respective prefectures of Japan. Although prefectural police are, in principle, regarded as municipal police, they are mostly under the central oversight and control of the National Police Agency.
In India, the police forces of the states and union territories are responsible for law enforcement in the states and union territories. Police and Public Order are State subjects under the Seventh Schedule to the Constitution of India.
