The Headquarters Mobile Support Unit is the police tactical unit of the Police Service of Northern Ireland. The HMSU was originally formed in the then Special Branch part of the Royal Ulster Constabul
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John Weir (loyalist)
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John Oliver Weir is an Ulster loyalist born and raised in the Republic of Ireland. He served as an officer in Northern Ireland's Royal Ulster Constabulary's Special Patrol Group, and was a volunteer i
Headquarters Mobile Support Unit
…The SSU was subsequently renamed the Headquarters Mobile Support Unit (HMSU) after two of its members were convicted of kidnap and murder. The two, John Weir and Billy McCaughey, implicated some of their colleagues in a range of crimes including giving weapons, information and transport to loyalist paramilitaries…
The village of Ahoghill, County Antrim, where the Strathearn killing took place