Homosexual Royal Navy sailor Grimson was convicted of the partially sexually-motivated murders of two other (non-homosexual) Royal Navy sailors while docked in Portsmouth on December 12, 1997 and on December 12, 1998.
He is strongly suspected of being responsible for up to 20 other murders across different navy bases of the world, including in Gibraltar and New Zealand.
Grimson is also the prime suspect in the disappearance of fellow Royal Navy sailor Simon Parkes from Gibraltar in 1986, in part because he disappeared on December 12, the date when Grimson was known to have always killed his victims on, and because Grimson was docked in Gibraltar with the navy at this time. Grimson’s 2001 trial judge told him that he was ‘a serial killer in nature if not in number’.
His release from prison is imminent and he is currently being held in an open prison with day release provisions.
