Karen Slattery was brutally raped and stabbed 18 times by Duane Owen, who was sentenced to death for her murder and the murder of another womanA defenceless 14-year-old girl endured the most horrific death when a deranged killer invaded the house where she was caring for two youngsters, spending her final moments in unimaginable agony. Karen Slattery's murder was amongst two shocking killing sprees in 1984 carried out by murderer Duane Owen. The secondary school pupil had a promising future as a sought-after childminder and was a diving champion at Pope John Paul High who was preparing to audition for...