Hughes initially joined the
Official Irish Republican Army, but left after the organisation declared a ceasefire in May 1972. Hughes then joined up with
Dominic McGlinchey, his cousin
Thomas McElwee and
Ian Milne, before the three decided to join the
Provisional Irish Republican Army's South Derry Brigade in 1973. Another IRA member described the activities of Hughes: On 18 April 1977, Hughes, McGlinchey and Milne were travelling in a car near the town of
Moneymore when an RUC patrol car carrying four officers signalled them to stop. The IRA members attempted to escape by performing a
u-turn, but lost control of the car which ended up in a ditch. They abandoned the car and opened fire on the RUC patrol car, killing two officers and wounding another, before running off through fields. A second RUC patrol came under fire while attempting to prevent the men fleeing, and despite a search operation by the RUC and
British Army (BA) the IRA members escaped. Following the Moneymore shootings, the RUC named Hughes as the most wanted man in
Northern Ireland, and issued
wanted posters with pictures of Hughes, Milne and McGlinchey. Milne was arrested in
Lurgan in August 1977, and McGlinchey later in the year in the
Republic of Ireland. ==Arrest and imprisonment==