Although foul play isnt suspected, the circumstances of deaths necessitated further investigation, the sheriffs office said.
The official results of the autopsy and toxicology reports are pending, the office said.
This remains an open investigation.
Gene Hackman and wife Betsy Arakawa in 1986Donaldson Collection/Michael Ochs Archives/Getty Images
(Sheriffs requested carbon monoxide and toxicology tests, however, for both Hackman and Arakawa.)
The bodies werent discovered until two security workers arrived at the property and found the front door ajar.
Upon inspecting the home by looking into windows, the bodies were seen and they alerted authorities.
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This remains an open investigation.
This story was updated Feb. 28 at 10 a.m. PST with the updated search warrant.
