What type of details about john weir -lrb- loyalist -rrb- can be gathered from the following bio? Bio: john oliver weir -lrb- born 1950 -rrb- is an ulster loyalist born in the republic of ireland . he served as an officer in northern ireland 's royal ulster constabulary 's -lrb- ruc -rrb- special patrol group -lrb- spg -rrb- -lrb- an anti-terrorist unit -rrb- , and was a volunteer in the illegal ulster volunteer force -lrb- uvf -rrb- . as a member of the uvf 's mid-ulster brigade led by robin '' the jackal '' jackson , weir was a part of the glenanne gang , a group of loyalist extremists that carried out sectarian attacks mainly in the county armagh area in the mid-1970s . along with his ruc colleague billy mccaughey , weir was convicted of the 1977 sectarian killing of catholic chemist william strathern and sentenced to life imprisonment . weir 's affidavit which implicated jackson , other members of the glenanne gang , soldiers of the ulster defence regiment -lrb- udr -rrb- , and his colleagues in the ruc and spg , in a series of sectarian attacks , including the dublin and monaghan bombings , was published in the 2003 barron report , the findings of an official investigation into the 1974 car bombings commissioned by irish supreme court justice henry barron .
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