Betsy Arakawa died from hantavirus pulmonary syndrome, a rare rodent-spread disease with a mortality rate up to 50% in the American Southwest, officials said.

An examination of the dog found dead along with actor Gene Hackman and his wife in their Santa Fe home shows dehydration and starvation were likely what led to the animal’s demise. A report obtained by The Associated Press from the Santa Fe County animal control agency details partial mummification and noted that while the severe decomposition could have obscured changes in the organ,

The two-time Oscar winner’s will reportedly does not name his three children, Christopher, Elizabeth, and Leslie.