Lidya Litvyak

Hello, I am new here, so hi to anyone, and thanks in advance for Your time. I am doing a research to find out if and where Lidya Litvyak, the famouse Soviet female "ace" was and - if "yes" - where keps as a prisoner in German POWs. The official history claims she was found buried under the wing of her shot-down Yak-1 more than 20 years after her crash, but roumors still persist that she survived and was kept in a prisoner of war Luftwaffe Kamp. Can anybody help?
Thanks a lot!
Gian Piero Milanetti