Sister of Bloody Sunday victim challenges judge's role

The sister of a teenager shot dead by British troops on Bloody Sunday is mounting a legal bid to have Northern Ireland’s top judge excluded from an Appeal Court hearing challenging a ruling to have police witnesses screened at the Saville Tribunal.

Lawyers for Mary Doherty, whose brother Gerard Donaghy, 17, was killed, want the Lord Chief Justice Sir Robert Carswell to disqualify himself as one of three judges on the grounds that his impartiality may have been compromised.