Ok, after looking long and hard in the wrong book I picked up my copy of Tigers in Combat by Schneider and on page 45 I found this: 1 May 1944: 29 tanks operational. The battalion is attached directly to the 3. Panzer-Armee.
Oberleutnant Kriepahle is the new commander of the 2./schwere Panzer-Abteilung 501. His "radio operator" is a female Russian! The commander of the 3./schwere PanzerAbteilung 501 is reported missing in action.
I do not know how true this is, or where Schneider got the information. I would hope that he would not print questionable information, especialy something like this, without knowing it was 100% true. I would figure that is one of the first things in the book to be questioned.