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.