A Thunder Bay man is going to spend at least the next 10 years in prison after pleading guilty to second degree murder in the death of his wife. 64 year old John Robertson admitted to hitting, then strangling his wife to death at their Oliver Road apartment in April of last year. He was sentenced to life in prison and will be eligible for parole in 10 years. Crown Attorney Dan Mitchell says it was a case like no other. He says Roberston turned himself in to police after the incident and helped the case proceed through the system quickly.