RUC Special Branch was the Special Branch of the

Royal Ulster Constabulary The Royal Ulster Constabulary (RUC) was the police force in Northern Ireland from 1922 to 2001. It was founded on 1 June 1922 as a successor to the Royal Irish Constabulary (RIC) Richard Doherty, ''The Thin Green Line – The History of the ...

, and was heavily involved in the British state effort during

the Troubles The Troubles () were an ethno-nationalist conflict in Northern Ireland that lasted for about 30 years from the late 1960s to 1998. Also known internationally as the Northern Ireland conflict, it began in the late 1960s and is usually deemed t ...

, especially against the

Provisional Irish Republican Army The Provisional Irish Republican Army (Provisional IRA), officially known as the Irish Republican Army (IRA; ) and informally known as the Provos, was an Irish republican paramilitary force that sought to end British rule in Northern Ireland ...

. It worked closely with MI5 and the Intelligence Corps. The RUC came under criticism for its handling of its agents within paramilitary organisations, including from other RUC officers. Appointed in 1984 to investigate claims of a RUC "shoot-to-kill" policy, former Deputy Chief Constable of Greater Manchester Police, John Stalker, said that he "had never experienced...such an influence over an entire police force by one small section" in regard to Special Branch. Vicky Conway
Policing Twentieth Century Ireland: A History of An Garda Síochána
p. 139

References

Special Branch Law enforcement in Northern Ireland The Troubles (Northern Ireland) {{NorthernIreland-stub