Another case so dear to many of our hearts.
Sharon Marshall aka Suzanne Davis aka Tonya Hughes
To this day, no one knows this girl's true identity. After she died in 1990 in a supposed hit-and-run accident, investigators looked into her background. They determined that the man who called himself her husband must have kidnapped her sometime around 1973 and raised her as his own daughter.
There is a lot of info about Sharon in the Websleuths archives:
and her current thread is: