A one-time brother-in-law of Sinn Fein’s Martin McGuinness, who was jailed in America for attempting to import a missile to Ireland, claimed at the new Inquiry into Bloody Sunday he had been ‘‘brutalised’’ by events that day 29 years ago.

Sein Fein says doubts cast by a former MI5 officer on claims that Martin McGuinness fired a shot before the Bloody Sunday massacre prove that the allegations are bogus.