Captain Robert Laurence Nairac GC was a British Army officer in the Grenadier Guards. He was abducted by republicans from a pub in South Armagh, during an undercover operation he was undertaking, and killed by the IRA. From Wikipedia
Investigators believe the exhumation may uncover the remains of Joe Lynskey, who was abducted, murdered, and secretly buried by the IRA in 1972 during the Troubles.