Gene Hackman and his wife, Betsy Arakawa, tested negative for carbon monoxide poisoning, the Santa Fe Sheriffs Department in New Mexico said Friday, one day after they were found dead with their dog.

Gene Hackman and Betsy Arakawa received a touching tribute from the Santa Fe Film Commission following the pair's recent deaths. At the top of a Friday press conference, Santa Fe Film Commissioner Jennifer LaBar-Tapia opened with a tribute on what the late actor and wife meant not only to the film industry but to the city they called home.

Santa Fe County Sheriff Adan Mendoza told NBC's “Today” show that investigators were trying to sort out conflicting stories about the doors. He said several doors were unlocked and a rear door was open, which allowed two dogs that survived to go in and out. He also said he thinks the front door was closed but unlocked.