Royal Navy petty officer who murdered two young sailors is jailed for a further 22 years for sexually assaulting four others in the 1990s

A former Royal Navy petty officer who is serving life for two murders has been jailed for a further 22 years - after being found guilty of sexually assaulting three young naval recruits and a 14-year-old boy in the 1990s.Allan Grimson was found guilty in July of a string of attacks against other young men, having been jailed for life in 2001 for the murders of naval rating Nicholas Wright, 18, and Sion Jenkins, 20, a barman who had also served in the Navy.He had invited the two young men back to his flat and killed them both with a baseball bat when they rejected his sexual advances before dumping their bodies on two dates exactly a year apart in the 1990s.Sentencing him today for the string of sex offences, a judge warned double killer Grimson 'remains a danger to the public'.The 67-year-old, from Portsmouth, Hampshire, was convicted following his trial this summer of the rape and indecent assault of a teenage naval rating, and indecent assault charges against three other male complainants, dating between February 1994 and November 1999.He was also convicted at Winchester Crown Court of taking indecent photos of the child victim.The court had heard Grimson told police a sailor whom he is now convicted of sexually assaulting was 'lucky to be alive', and added: 'If you're going to rape somebody, to get away with it, kill it.' The court heard Allan Grimson, now 66, was jailed for life in 2001 for the murders of two sailors Nicholas Wright, 18, and from Leicester, was killed by Grimson on December 12, 1997 Sion Jenkins, pictured, was 20 when he was killed by Grimson The double killer smirked as he awaited sentence for the 13 offences before Judge Paul Dugdale told him: 'It won't surprise anyone to know I have made a finding of dangerousness.'He explained: 'I have assessed you remain dangerous as defined by section 308 of the Sentencing Act in that you still pose a significant risk to members of the general public of serious harm.'I base this assessment upon the two previous convictions for murder and the similarity between these matters and the current offences.'I find there was a link in your psychology between sexual assaults and an urge to inflict serious violence.'This was clearly evident in the late 1990s and its consequences so extreme that you will always pose such an underlying risk to the public.'It's difficult to envisage anyone who would not assess you as dangerous having heard the comments you made in the interviews in 2000 and what nearly happened to these men.'It's extremely difficult for any court to take the risk you no longer pose a danger to the public given the clear comments you made and past offending.'He added: 'You won't be released on life licence until the parole board consider it safe for you to do so and if they do not do so, you will remain in custody for life.'The judge explained that Grimson would not be eligible for parole until he had served 13 years of this sentence, which would be three months before his 80th birthday.Grimson, who wore a cream jumper in court and showed no emotion, was branded a 'serial killer in nature if not by number' when he was jailed for life in 2001, having told police killing 'was better than sex, better than an orgasm'.The non-commissioned officer had pleaded guilty to the murder of Mr Wright, from Leicester, between December 11 1997 and December 17 1999, and killing Mr Jenkins, from Newbury, Berkshire, between November 1 1998 and December 18 1999.Grimson had been eligible for parole from 2023 and had been transferred to a category C prison but was moved back to a category B prison after he was charged with the offences which he has now been sentenced for.He had denied the latest charges, claiming he was only standing trial as a 'tactic' to stop him from being freed on parole – after he was cleared to be moved to an open prison as a first step towards being released.He had met the complainants, apart from the 14-year-old, when they were young naval recruits taking part in a course at the Royal Navy Firefighting School on Horsea Island, Portsmouth, where he was an instructor.He assaulted the victims in the same flat where he murdered his two other victims in Portsmouth, Hampshire.The court heard he had also been with them at the Portsmouth nightclub, 'Joanna's' – which is also where he had been with his murder victims before taking them to his flat.Grimson served in the Royal Navy and in 1999 he was a Petty Officer Marine Engineering Mechanic and an instructor at the Royal Navy Firefighting School in Horsea Island, Portsmouth.The court heard his position 'brought him into contact with many young males aged in their late teens' over whom he 'exercised great authority, by reason of his status'.