Diane Wells said the gun was stolen out of her car at a car wash.
"I was completely shocked. I didn't know the gun was stolen until I parked in the yard, in the driveway, then I realized it," Wells said. "I called them, but they said they couldn't do anything."
Police said a man used the weapon to shoot an off-duty cop fending off would-be robbers at a used car dealership in the Bronx.
The officer was able to subdue the shooter. Now four men face charges in connection with the incident.