On Tuesday, it was confirmed through autopsy that Betsy died from hantavirus pulmonary syndrome. Her lungs were described as heavy and congested, with fluid accumulation in her chest and mild hardening of the vessels supplying blood to her heart and body, according to the Associated Press.

The Office of the Medical Investigator in New Mexico released the final autopsy results in the deaths of Gene Hackman and his wife, Betsy Arakawa Hackman.

PEOPLE obtained a final autopsy report regarding Gene Hackman and his wife Betsy's February deaths on Sunday, April 27. New Mexico's Office of the Medical Investigator ruled on Feb. 27 that Gene died of hypertensive and atherosclerotic cardiovascular disease,