Grimson, dubbed the Frankenstein killer for his hulking 6ft 2in frame, was jailed for life in 2001 for killing Nicholas Wright, 18, from Leicester, and Sion Jenkins, 20, from Newbury, Berkshire.
The family of Simon Parkes, who was 18 when he vanished without trace from HMS Illustrious in 1986 in Gibraltar, have spent four decades looking for closure - and are a step closer
Royal Navy Rating Simon Parkes, from Bristol, was last seen drinking at a pub in Gibraltar after the ship the 18-year-old was serving on, HMS Illustrious, docked
Simon Parkes, from Bristol, was last seen drinking at the Horseshoe Pub on Main Street after the ship he was serving on, HMS Illustrious, docked in Gibraltar in December 1986.
Renewed search for missing Royal Navy sailor Simon Parkes ends portsmouth.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from portsmouth.co.uk Daily Mail and Mail on Sunday newspapers.