Gene Hackman and his wife, Betsy Arakawa, tested negative for carbon monoxide poisoning officials said Friday as they continue to investigate what caused the couple's deaths.

Betsy Arakawa was a classical pianist, creative partner and supportive wife who loved watching DVDs with her husband Gene Hackman.

Hackman and his wife, Betsy Arakawa, apparently had been dead for days or even a couple of weeks when investigators found their bodies while searching the couple's Santa Fe home on Wednesday. Investigators are trying to figure out the last time anyone saw or spoke to them, Santa Fe County Sheriff Adan Mendoza told NBC's “Today” show on Friday.