Preliminary autopsy results didn’t determine how Oscar-winner Gene Hackman and his wife died at their home in Santa Fe, New Mexico, but did rule out that they were killed by carbon monoxide poisoning,

Oscar-winning actor Gene Hackman, 95, and his wife, classical pianist Betsy Arakawa, 63, were found dead Wednesday in their Santa Fe, New Mexico, home, authorities confirmed to HuffPost. The couple’s dog was also discovered dead.

Gene Hackman and his wife Betsy Arakawa were likely dead for over a week before being discovered in their New Mexico home. Investigators ruled out carbon monoxide poisoning. An initial examination revealed no signs of it,