For years, Walburga “Dolly” Oesterreich appeared to be living an ordinary married life with her wealthy husband, Fred Oesterreich.
What Fred didn’t know was that another man was living inside their house.
Around 1913, Dolly began an affair with Otto Sanhuber, a teenage sewing-machine repairman who worked for her husband. To keep their relationship secret, Otto eventually moved into the attic of the Oesterreich home, where he lived hidden away while Fred went about his life below completely unaware.
When the couple later moved from Milwaukee to Los Angeles, Otto came too—and once again took up residence in the attic of their new home. He spent his days reading and writing while Dolly secretly brought him food and continued their affair.
Then, on August 22, 1922, everything changed.
During an argument between Dolly and Fred, Otto emerged from his hiding place and shot Fred Oesterreich to death. Dolly and Otto then attempted to make the killing look like a botched burglary. Otto locked Dolly inside a closet, took valuables from the house, and disappeared back into the attic before police arrived.
Investigators suspected Dolly, but there was one major problem: they couldn’t explain how she could have murdered her husband, locked herself inside a closet, and made the supposed killer disappear without a trace.
The truth would remain hidden for years.
Otto continued living secretly in Dolly’s attic even after Fred’s death, while Dolly carried on other relationships—including one with her attorney. Eventually, former lovers, suspicious gifts, hidden guns, and Dolly’s increasingly complicated web of secrets began unraveling the story.
In 1930, authorities finally learned about the mysterious man who had lived above the Oesterreich household.
Otto confessed to shooting Fred and was convicted of manslaughter, but the conviction could not stand because the statute of limitations had expired. Dolly later faced conspiracy charges, but her trial ended with a hung jury, and the case against her was ultimately dropped.
This is the historical true crime story of Dolly Oesterreich and the Lover in the Attic—a secret affair, a hidden man living above an unsuspecting husband, a staged burglary, and one of the strangest murder cases ever to come out of Los Angeles.
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