Thomas McMahon is a former volunteer in the South Armagh Brigade of the Provisional Irish Republican Army (IRA) and was one of the IRA’s most experienced bomb-makers. McMahon was convicted of the murder of Lord Louis Mountbatten and three others off the coast of Mullaghmore, County Sligo, in the west of Ireland.
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McMahon was arrested by the Gardaí (the Republic of Ireland’s police force) at a Garda checkpoint between Longford and Granard on suspicion of driving a stolen vehicle two hours before the bomb detonated.
After his release, Toby Harnden in Bandit Country reported that McMahon was holding a tricolour in the first rank of the IRA colour party at a 1998 IRA meeting in Cullyhanna. However, according to a BBC report, McMahon has said that he left the IRA in 1990.
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As of 2009, McMahon was living with his wife in a hillside bungalow in Lisanisk, Carrickmacross, County Monaghan. He has two grown sons. He helped with Martin McGuinness’s presidential campaign in 2011, erecting posters for McGuinness around Carrickmacross.

Thomas McMahon Wife: Is Thomas McMahon Married?
Yes, Mcmahon is a married man. He is the husband of Rose.
McMahon’s wife Rose is a former Sinn Fein Carrickmacross town councillor.
She was co-opted into the seat in 2008 when Sinn Fein councillor Eamon Conlon left politics but she failed to get re-elected the following year.


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