When they were young, Patricia and Joan Miller sang and danced for Bing Crosby, troops and their friends.
But as the identical twins grew older, they became less interested in socializing. When people called, the sisters came up with excuses to get off the phone. Without explanation, they stopped sending birthday cards to a childhood friend. And on the rare occasion when they left their home, the two women didn't chat up the neighbors.
Never married and without children or pets, the Miller sisters withdrew into their four-bedroom home in California's South Lake Tahoe, where they were found dead last week at the age of 73. One was in a downstairs bedroom and the other was in the hallway just outside.
It was as if the two sisters, long each other's only companion, could not live without each other, said Detective Matt Harwood with the El Dorado County sheriff's office.
"My perception is one died and the other couldn't handle it," said Harwood, who has been unable to identify any close friends or family members to inform of the sisters' deaths. "It appears purely natural, but we are still trying to piece it all together."
Police don't usually release the names of the dead without first informing their relatives, but the sisters' shrouded lives made that impossible, Harwood said.
"The circumstance surrounding their death is somewhat of an enigma," he said. "These two only ever had each other, and we would like, at least for their sake, to notify their family."
The deaths have confused some residents in the resort town of South Lake Tahoe, where homeowners tend to be close-knit and the sisters' reclusiveness had long inspired questions and concern. Police and neighbors alike are struggling to understand why or how two beautiful women with show business experience shut themselves up in the same home for nearly 40 years and then seemingly died within hours of each other.
In the past year, there were hints that something was amiss at the Miller home. A neighbor spotted an ambulance at the house a year ago and assumed they had fallen ill. Someone asked police to check regularly on the house. When someone arrived Feb. 25 for a routine check, no one answered the door. The next day, police forced their way in and found the bodies.
There was no blood, no signs of struggle. Nothing indicated that the women had persistent health troubles. Their longtime home was not disheveled or unkempt, potential signs of mental or physical illness. Autopsy reports were pending.

Twin sisters, 73, found dead together in CA home - Yahoo! News