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,

After Gene Hackman, 95, and his wife Betsy Arakawa, 64, were found dead in their home on Wednesday, Feb. 26, his daughter said the family thinks carbon monoxide poisoning might be to blame. The investigation is ongoing.

Gene Hackman's daughter, and some internet sleuths, speculate that the Hollywood legend and his wife died by carbon monoxide poisoning.