You've probably read "Last Seen Alive: The Search for Missing Pows from the Korean War" by Laurence Jolidon but have you been in touch with Texas University to see if you can access Jolidon's papers?
Box 4La137 includes stuff on Baumeister. But I'm probably telling you stuff you already know.
http://www.lib.utexas.edu/taro/utcah...cah-00375.html
I will scan the relevant pages of the aforementioned pages tomorrow.