By Grant McCabe & Charlie Duffield A thug has now been jailed due to his “merciless” abuse of a woman and boy for nearly three decades. Kenneth Quinn was convicted of the attacks which spanned 27 years. The woman and child frequently suffered at the 49-year-old’s violent hands, which included the continual rape of the woman. Quinn confessed to the jurors that he was “utterly ashamed” of himself. He conceded to physically harming both, but said the sex attacks did not take place. However, Quinn was convicted of ten charges amid a distressing trial at the High Court in Glasgow. In addition, Quin…