The man's body was discovered in a rest area about 24 kilometres south of Fort Nelson around 3:30 p.m. PT. in a grey 2013 Hyundai Sonata.
The vehicle had been rented in Surrey, B.C., five days earlier on Monday, Sept. 30.
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Investigators originally said the man's death was being considered suspicious, but on Tuesday RCMP announced this was no longer the case and the file was now with the B.C. Coroners Service.