Arakawa was discovered lying on the bathroom floor of the couple's home, with an open prescription bottle of pills scattered across a nearby countertop.
A space heater was found next to her head, which investigators believe may have fallen.
Hackman was found dead in a mud room off the couple's kitchen, the warrant said.
Grim new details about the couple's deaths have emerged.
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Sky News halted for breaking news as the Sheriff's office confirmed that Gene and Betsy had been "dead for some time".
Meanwhile their dog was found dead inside its kennel, Sheriff Adan Mendoza revealed.
No suicide note was found and there were no obvious signs of trauma to the bodies," Mendoza added.
The deceased dog, a German Shepherd, was found 10 to 15 feet from Betsy, in a closet of the bathroom. Two other dogs were found alive and healthy -- one inside the house and one outside.
The
bodies were discovered by 2 maintenance workers, who said they hadn't seen them in approximately 2 weeks. When the maintenance workers arrived to discover the bodies, the front door was ajar, but the deputy says there were no signs of forced entry.
Gene Hackman's death and the deaths of his wife and dog are puzzling authorities, who have labeled his passing "suspicious."
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