The picture that you probably saw was from the Battle of the Bulge. This man was in Kampfgruppe Hansen of the 2nd Company, I./SS-Pz.Gren.Rgt 1. His name is Walter Armbrusch, and he possesed the rank of SS-Schütze as an MG-42 gunner. Here he is seen after a successful attack on an Allied reconnaisance convy, with gear obtained from it. The picture is taken during the early days the Battle of the Bulge.”
The pistol was probably captured, but perhaps not from the 14th Cavalry Group whose vehicles are in the pictures.
That probably is the picture I have in my memory. A German holding a Hi-Power in one hand. He looks a bit battle weary and maybe a bit dirty.
I have several photos of that SS panzer grenadier one captioning the pistol he’s holding as a variant of the Walther 9mm. Was there such a pistol?
Seeing that the FN plant was under German occupation from 1940 to fall of 1944, there were many Hi-Powers produced during that time.