I was born at Elwangen in 1947 and we emmigrated to America in late 1949. I have a few pictures of my Dad ( passed away 1996) he was camp security. I will borrow them from my Mom and scan them in assuming she can find them. My Mom who is still alive mentioned a demonstration against Operation Keelhaul the Forced Repatriation of former "citizens" of the USSR. This travestty against Ukrainians is barely recorded in history. Lke that is a big surprise !
Spelling of surname at that time was Matijasz now Matiash