ABC News | Woman pleads guilty to killing abusive fiance in Sydney five weeks after they got engaged ABC News A woman has pleaded guilty to the manslaughter of her abusive fiance in Sydney's south-west last February. Cathrina Ann Cahill, 27, is accused of stabbing her 29-year-old fiance David Walsh in the neck after a fight outside their Padstow home. The two ... Irish woman admits to fiance's manslaughter Wexford woman Cathrina Cahill pleads guilty to manslaughter of fiancé David Walsh in Sydney, Australia Irish woman pleads guilty to killing fiancé David Walsh in Sydney |