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Sandy Charlie's son, Sandy Cleghorn, died while trying to search for his father in Lytton in 2000. (RCMP)

Cold case cops in British Columbia have arrested a 45-year-old Langley man in a killing going back more than 13 years.

Sandy Charlie, 48, disappeared from his home in Lytton in December 1999, but his remains weren't discovered until September last year when they were found in a concealed grave.

The Provincial Unsolved Homicide Unit was called in to take over the investigation.

The RCMP says that probe has led to a manslaughter charge against William Robert Smith, 45, who was arrested in Langley.

The death turned out to be a double tragedy for the Charlie family when the victim's 22-year-old son, Sandy Cleghorn, died while searching for his father.

Cleghorn disappeared in January of 2000 after he travelled to Lytton to look for his father, and his body was found in the Fraser River two months later.