Declan Duffy
Former paramilitary and convicted murderer
About Declan Duffy
Declan Duffy, also known as Declan "Whacker" Duffy, is an Irish former paramilitary member and convicted murderer.
Early life He is originally from Armagh, Northern Ireland.
Paramilitary involvement He joined the Irish National Liberation Army while still a teenager in the 1980s.
In May 2009 he pleaded guilty to membership of the organisation and also dissociated himself from it.
In July 2010 he pleaded guilty to the 1992 murder of Sergeant Michael Newman in Derby and was sentenced to 24 years.
He was released in 2013 under the terms of the Good Friday Agreement but was recalled to prison for breaching his licence in 2020. He is not now due for release until 2034 after losing an appeal in May 2024.
Subsequent criminal career He was arrested in July 2015 in Dublin in connection with allegations of extortion.
On 5 December 2015 he was arrested in connection with the abduction of Martin Byrne. He was convicted of false imprisonment on 6 June 2016. He had been released on licence but this was revoked after his conviction
He was then extradited to the UK in 2020 after his false imprisonment sentence was served in the Republic to resume serving the balance of his sentence for murder.
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Frequently asked questions
Who was Declan Duffy?
former paramilitary and convicted murderer
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Declan Duffy. https://biography.guide/declan-duffy/
MLA: "Declan Duffy." Biography.guide, https://biography.guide/declan-duffy/.
Chicago: "Declan Duffy." Biography.guide. https://biography.guide/declan-duffy/.
Data last updated: 2026-09-20 · Spot an error? Report a correction.
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