Last year, James Watson (pictured), who was 13 when Rikki died and is now 41, was jailed for the crime by a judge at the Old Bailey after damning new evidence came to light.
The six-year-old was found strangled, naked and arranged in a star pose in woods near his home in Peterborough, the day after he was reported missing by his mother on November 28, 1994.
The ancient seat of the Lords of the Isles was home to a thriving agricultural community that virtually disappeared after the kingdom was signed over to Scotland, breakthrough research has found.