Family’s relief at conviction of ‘Frankenstein’ who said killing was better than sex

Allan Grimson has been convicted of historic sexual offences, putting paid to his chances of freedom (Picture: PA) For 40 years the parents of a Royal Navy sailor have suspected they know their son’s killer. Simon Parkes was just 18 when he vanished in Gibraltar without a trace during the final leg of a worldwide deployment on HMS Illustrious in 1986. His body has never been found and, desperate for closure, his parents Margaret and David are convinced he was murdered by serial killer Allan Grimson, a former petty officer who was serving aboard the ship at the same time. Grimson made a bid for freedom last year, but the parole board turned it down. The hearing came after Grimson became eligible for parole having served the minimum term attached to the life sentence he received for murderin