Locations
Grove Road, Hollesley, Suffolk, IP12
Description
Today (Monday 27 July) at Winchester Crown Court a 66-year-old man has been found guilty of thirteen non-recent sex offences, which took place between 1994 and 1999 against three men and a child.
Allan Michael Grimson of Grove Road in Hollesley, Suffolk was served a postal requisition on Friday 7 February 2025 and his subsequent trial began on Monday 29 June 2026.
Grimson has been found guilty of:
- The indecent assault of a 19-year-old man in Tyne and Wear in 1994.
- Five indecent assaults of a 17-year-old boy in Portsmouth in 1999.
- The rape of an 18-year-old man in Portsmouth in 1999.
- Four indecent assaults of a 14-year-old boy in Portsmouth in 1999.
- One offence of taking indecent images of a child in Portsmouth in 1999.
- The indecent assault of a 19-year-old man in Portsmouth in 1999.
- The prosecution follows a detailed investigation undertaken by Hampshire & Isle of
Wight Constabulary into the offences that took place at locations including a flat on London Road in Portsmouth.
Grimson, a former Royal Navy petty officer who is already serving a life sentence after he was convicted in 2001 of two murders, has been remanded into custody to appear at the same court for sentencing on 6 November 2026.
From the CPS
A former Royal Navy petty officer already serving a life sentence for the murders of two young men has been convicted of a series of non-recent sexual offences.
Allan Grimson, 66, was found guilty by a jury at Winchester Crown Court of offences committed between 1994 and 1999 against a teenage boy and young Royal Navy recruits.
Grimson, who served as an instructor at the Royal Navy Firefighting School at Horsea Island, used his position to target and sexually abuse boys and young men over a number of years. Victims included a 14-year-old boy and young servicemen at the start of their naval careers.
The convictions follow a review of allegations dating back more than 20 years, including a case reconsidered following a referral to the Child Sexual Abuse Review Panel.
After reviewing the evidence, the Crown Prosecution Service authorised charges against Grimson.
Grimson is already serving a life sentence for the murders of Royal Navy ratings Nicholas Wright and Sion Jenkins, whom he killed in 1997 and 1998 after meeting them in Portsmouth. They were both sexually assaulted before they were murdered.
James Foster, Specialist Prosecutor, of the Crown Prosecution Service, said:
"Today's verdicts are the result of the courage and determination shown by the victims, some of whom first reported what happened to them more than two decades ago.
“Non-recent sexual abuse cases can present significant evidential challenges, particularly where allegations relate to events many years in the past. However, the passage of time is not a barrier to justice where there is sufficient evidence to bring a prosecution.
"Following a referral to the Child Sexual Abuse Review Panel, we carried out a fresh review of one of the original decisions in this case and concluded that criminal charges should be brought.
"I would like to thank the victims for the bravery they have shown throughout this investigation and trial. We hope today's outcome provides some measure of justice and recognition of the abuse they suffered."