Anne Doherty says Robert Black did not murder her sister Mary

maryboyleAnne Doherty has described as 'outrageous' claims in the media that Robert Black may have murdered her sister Mary.

Notorious serial killer Robert Black died in prison in Northern Ireland yesterday while serving 12 life sentences for the murders of four schoolgirls in the 1980s.

He has also been widely reported as the main suspect in the disappearance of Mary Boyle from Ballyshannon in 1977.

Ann Doherty believes that her sister was murdered by somebody close to her because she was going to reveal a terrible secret.

Speaking on behalf of Ms Doherty, Journalist Gemma O'Doherty says Mary's killer is still at large in Donegal: