The curious case of legendary actor Gene Hackman and his wife Betsy Arakawa’s mysterious deaths continues. Hackman and Arakawa, who were found dead with their dog in Santa Fe, New Mexico last week, tested negative for carbon monoxide poisoning (a case many thought could be the culprit of the deaths). Sheriff Adan Mendoza stated that while autopsy results did not show any external trauma, further investigations will be needed to determine the cause of death. The deaths are still considered suspicious, with no signs of foul play or gas leaks found. Hackman apparently died more than a week earlier than his wife on February 17th.