The pair were discovered by workers at a convenience store, where the car had been parked overnight, on Monday.
The day before, 62-year-old Carr had abandoned his wife Chikako, 50, in a grocery store hundreds of miles away in Oregon.
Police say there were no signs of foul play, and are conducting toxicology tests on the bodies to determine the cause of death.
Days before they disappeared someone was spotted dumping items belonging to Carr in a pasture near a home the producer was renting in Oregon.
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