Authorities have answers on the shocking deaths of Gene Hackman and his wife Betsy Arakawa. The couple died of natural causes at their New Mexico home last month, authorities shared in a March 7 press conference. Based on surveillance footage, Arakawa, 65, is believed to have died on Feb. 11. Her cause of death was ruled to be hantavirus pulmonary syndrome-a severe respiratory illness that is transmitted through rodent urine, droppings and saliva-per lab testing. As for Hackman, the two-time Oscar winner, 95, is believed to have died a week later, on Feb. 18 after his pacemaker recorded an “abnormal atrial fibrillation” or an abnormal heart rhythm, per authorities. His cause of death is hypertensive and atherosclerotic cardiovascular disease (ASCVD)-or hardening of the arteries-with Alzheimer’s disease as a significant contributing factor. The medical investigator shared that Hackman was in an “advanced state” of Alzheimer’s-a neurodegenerative brain disorder-and “it’s quite possible that he was not aware that was deceased.” There was no food in his stomach at his time of death. Their dog is still being tested to determine the cause of death, though authorities clarified that dogs cannot contract hantavirus. New Mexico County Sheriff’s Office deputies had found Hackman, Arakawa and one of their three dogs deceased inside the couple’s Santa Fe home Feb. 26 after a neighbor called 911, requesting a welfare check, authorities said. And while foul play was initially not suspected as a factor in their deaths, an official later stated in a search warrant affidavit, obtained by NBC News, that the circumstances were “suspicious enough in nature to require a thorough search and investigation.” Two maintenance workers told police they found the front door of the couple’s home ajar and Hackman and his wife dead inside, the affidavit said, and that deputies “did not observe any signs of forced entry into the home.” Hackman was found dead in a room believed to be a mudroom, the warrant states, with a deputy noting he believes the Superman star may have suddenly fallen. Arakawa was found on the floor of a bathroom, with a space heater near her head and a bottle of prescription pills on the counter with “with pills scattered on the countertop.” Both her and Hackman’s bodies showed “obvious signs of death,” while hers also showed signs of “body decomposition,” the report said. In addition, a deceased German shepherd was found about 10 to 15 feet from the Royal Tenenbaums actor’s wife, in a closet in the bathroom. Their two other dogs were found alive-one was in the bathroom with Arakawa and the other was outside the home.