One of the IRA volunteers captured , Michael Caraher , was the brother of Fergal Caraher , a Sinn Féin member and IRA volunteer killed by Royal Marines at a checkpoint on 30 December 1990 near Cullyhanna . Michael , also shot and wounded in the same attack , had lost a lung in the aftermath . The Marines involved were acquitted by Lord Chief Justice Hutton . The shooting of Guardsman Daniel Blinco in Crossmaglen took place on the second anniversary of the killing of Fergal Caraher . Michael Caraher was thought to be the shooter in several attacks , but he was only indicted for the case of the maimed constable . He was defended by solicitor Rosemary Nelson , later killed by the loyalist organisation Red Hand Defenders . The other three men of the sniper team were convicted in 1999 for six killings , two of them unrelated to the sniping operations ( the deaths of two men when one of the team 's members , James McArdle , planted the bomb at Canary Wharf in 1996 )
Canary Wharf
1996 Docklands bombing
South Armagh Sniper (1990–1997)