In 1978, he was sentenced to 12 years in prison for his alleged part in the
Sallins Train Robbery. The ensuing campaign to release him became a symbol of the 1980s with 'Free Nicky Kelly' graffiti posted throughout the country. The evidence of torture committed against him and his two co-accused, Osgur Breatnach and Brian McNally, galvanised a campaign for his release. There was a dedication to him in the 1983
Planxty album,
Words & Music.
Pat McCartan, who later became a
TD for the
Workers' Party, acted as his solicitor at this time, despite being on the opposing side in the SFWP–IRSP split. In 1984, Kelly was released on humanitarian grounds. He received a presidential pardon in 1992, along with over
IR£1 million as compensation following campaigns by
Amnesty International and the
Irish Council for Civil Liberties. The events of Kelly's arrest and trial(s) were the subject of an edition of the
RTÉ Television documentary series
Scannal, broadcast on 22 September 2014. ==Political career==