pow and family

Looking for information on a German Officer taken prisoner in WWII. We found some pictures of a German Officer & his family in my father's things. I don't know his name, could possibly be Schmidt. One of the pictures is him in uniform & probably his wife and daughter. I think the girl is probably in her sixties now.

I don't know when he was taken prisoner by the American forces but we would like to return these pictures to his descendants if we can find them. Any suggestions? My father served in the 9th Armored Division 131st Ordnance Maintenance Battalion, arriving in France in September 1944 (arrived in Europe on 8/20/1944 & returned to the states on 9/27/1945.) He served in Ardennes, Rhineland and Central Europe Campaigns.