From The New York Times:
Officials said the couple died of natural causes, he of heart disease and she of a rare viral infection. But it was Ms. Arakawa — the caregiver, lover, protector — who died first, perhaps on Feb. 11, leaving Mr. Hackman, 95 years old with advanced Alzheimer’s, alone in the house for days. He is believed to have died a week later, on Feb. 18.
Their decomposing bodies were not discovered for yet another eight days, when a maintenance worker called a security guard to the house after no one came to the door. Emergency workers found Ms. Arakawa, 65, on the floor of a bathroom near a medicine bottle and spilled pills. Zinna, one of their three dogs, was dead in a crate in a closet. The body of Mr. Hackman was discovered in a mud room, with slippers and a cane.