Editing Sean O'Callaghan (section)

==Imprisonment==
After becoming disillusioned with his work with the Irish Government after the murder of another of its agents within the IRA (Sean Corcoran in [[County Kerry]] in 1985), which it had failed to prevent despite O'Callaghan's warnings of the threat to him, and sensing a growing threat to himself from the organisation which had become suspicious of his own behaviour, O'Callaghan withdrew from the IRA and left Ireland to live in England, taking his wife and children with him. His marriage ended in a divorce in 1987,<ref name="obit"/> and on 29 November 1988 he walked into a police station in [[Tunbridge Wells]], [[Kent, England]], where, presenting himself to the officer on duty at the desk he confessed to the murder of [[Ulster Defence Regiment|UDR]] Greenfinch (female member) Eva Martin and the murder of D.I. Peter Flanagan during the mid-1970s, and voluntarily surrendered to British prosecution.<ref>O'Callaghan, pp. 307–09.</ref>

Although the Royal Ulster Constabulary offered him [[witness protection]] as part of the [[Supergrass (informer)|informer]] policy, O'Callaghan refused it,{{citation needed|date=August 2017}} and was prosecuted under charges of two murders and 40 other crimes, to all of which he pled guilty, committed in British jurisdiction with the IRA. Having been found guilty he was jailed for a total of 539 years.<ref name="obit"/> O'Callaghan served his sentence in prisons in Northern Ireland and England. While in jail, he published his story in ''[[The Sunday Times (UK)|The Sunday Times]]''. He was released after being granted the [[Royal Prerogative of Mercy]] by Queen [[Elizabeth II]] in 1996.