The GAA official was abducted and shot dead by loyalist paramilitaries in 1997
The UK's highest court will later hear a Government appeal against a court ruling, ordering it to hold a public inquiry into the murder of GAA Official Sean Brown during the Troubles.
The chairman of Bellaghy Wolfe Tones Club was abducted and shot dead by loyalist paramilitaries in 1997.
Previous court disclosure has revealed more than 25 people, including British-state agents, have been linked by intelligence to the killing.

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