The Criminal Investigation Department (CID) in the Irish Free State was an armed, plain-clothed counter-insurgency police unit that operated during the Irish Civil War. It was organised separately from the unarmed Civic Guard police force. The unit was formed shortly after the truce with the British (11 July 1921)[1] and disbanded in October 1923.
- ^ O'Halpin, Eunan (2000). Defending Ireland: the Irish state and its enemies since 1922. Oxford University Press. p. 11. ISBN 978-0-19-924269-6. Retrieved 3 October 2009.
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