Actor Gene Hackman died of heart disease a full week after his wife died from hantavirus in their New Mexico home, likely unaware that she was dead because he was in the advanced stages of Alzheimer’s disease, authorities revealed Friday.

Gene Hackman, the two-time Academy Award winner, had deep ties to New Mexico prior to his death. He moved into a home in Santa Fe with his wife, Betsy Arakawa, after their marriage in the late 1980s, according to The Associated Press.