Sinclair is currently serving a life sentence for killing 17-year-old Mary Gallagher in November 1978.

BBC: Crown in Angus Sinclair World's End retrial move

In 2000, Strathclyde Police did a cold case review of the unsolved murder of Mary Gallagher, which happened in November 1978.

BBC: NEWS | UK | Scotland | Edinburgh, East and Fife | A life of abuse, rape and murder

Martin McGuinness might still be too far off the lead to stand a chance of succeeding Mary McAleese, but if Sean Gallagher doesn't secure victory this final bad tempered exchange could be remembered as a game changer.

BBC: No charity from McGuinness in Gallagher donation row