Actor Gene Hackman, 95, and his wife, Betsy Arakawa, 65, both tested negative for carbon monoxide, authorities revealed Friday, amid an investigation after they were mysteriously found dead alongside one of their dogs at their home in Santa Fe,

Gene Hackman and his wife Betsy Arakawa both tested negative for carbon monoxide after their deaths, Adan Mendoza, the sheriff of Santa Fe County in New Mexico, said at a press conference on Friday, Feb. 28.

The last event recorded on the actor's pacemaker was on Feb. 17, nine days before his body was discovered in his home alongside his wife and dog.

Gene Hackman 's pacemaker was last operational on Feb. 17, the Santa Fe County Sheriff said Friday afternoon, suggesting the Oscar-winning actor had been dead for nine days before he and his wife, Betsy Arakawa, were discovered in their New Mexico home.

Santa Fe County Sheriff Adan Mendoza said Friday his department is still waiting for final autopsy and toxicology reports on the deaths of Gene Hackman and Betsy Arakawa, but has a fair idea of when the Oscar winner actually died.

Gene Hackman and his wife Betsy Arakawa tested negative for carbon monoxide in the initial results of the toxicology report, leading officials to rule out the gas as a cause of Hackman and Arakawa’s death, Sheriff Adan Mendoza said in a press conference on Friday.

Authorities in New Mexico continue to investigate the cause of death of actor Gene Hackman and his wife​ Betsy Arakawa, but they say it does not appear to be carbon monoxide poisoning.

Gene Hackman likely dead more than a week before being found. Carbon monoxide doesn’t appear to have been a factor. The investigation is ongoing.

Two-time Oscar winner Gene Hackman, 95, and his wife Betsy Arakawa have been found dead in their home in New Mexico, the Santa Fe New Mexican website said on Thursday. The website quoted Santa Fe County Sheriff Adan Mendoza as saying the couple had died along with their dog,