There are still "loopholes" to close in the investigation into Gene Hackman and Betsy Arakawa's deaths.
Although Dr. Heather Jarrell, New Mexico's chief medical examiner, revealed the 95-year-old actor died from "significant heart disease" one week after his wife Betsy, 65, passed away as a result of hantavirus - which is a rare flu-like illness carried by infected rodents - on February 11, the case is not yet closed.
