Record details
Today (Friday 6 November) at Winchester Crown Court a 67-year-old man has been sentenced to thirteen years in prison before being eligible for parole (of a total sentence of twenty-two years) after being 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.
On Monday 27 July this year, from which date the sentence runs from, Grimson was 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 is already currently still serving a life sentence after he was convicted in 2001 of two murders.
Following the sentencing Detective Inspector Martin Longyear said:
"This result has been achieved following an extensive investigation by officers from the Eastern Major Crime team, some of whom have returned from retirement to see this through to an end.
"Allan Grimson is a depraved and dangerous individual who is already serving a life sentence following his conviction in 2001 for the murders of two young men, and I sincerely hope that today's result ensures that he will remain behind bars for a long time to come.
"I would like to acknowledge the victims for their bravery in coming forward, and I hope that today will help them find some form of closure to be able to move forward, knowing Allan Grimson will be punished for the suffering he has caused them.
"We are committed to thoroughly investigating reports like this that are made to us and I would encourage anyone who may have been a victim of similar offences in the past or indeed any further victims of Grimson's offending to contact us. We recognise that victims may have chosen not to come forward at the time due to their personal circumstances or employment, but it is important to stress that victims of sexual offences receive anonymity for life. We want to secure justice for all victims of these kinds of offences".