Based on this information, it is reasonable to conclude that Mr. Hackman probably died around February 18. Based on the circumstances, it is reasonable to conclude that Miss Hackman passed away first, with February 11 being the last time that she was going to be alive.
The cause of death for Mr. Gene Hackman, aged 95 years, is hypertensive and atherosclerotic cardiovascular disease, with Alzheimer's disease as a significant contributory factor.
He was in a very poor state of health. He had significant heart disease, and I think ultimately that's what resulted in his death.
It's quite possible that he was not aware that she was deceased.
The cause of death for Miss Betsy Hackman, aged 65 years, is hantavirus, pulmonary syndrome. The manner of death is natural.
This occurs after a one- to eight-week exposure to excrement from a particular mouse species that carries Hantavirus.