I further urge you not to pursue any public campaign against this particular individual. A Lieutenant Colonel is a senior enough rank not to be trifled with.
Obersturmbannführer was a paramilitary Nazi Party rank used by both the SA and the SS. It was created in May 1933 to fill the need for an additional field grade officer rank above Sturmbannführer as the SA expanded. It became an SS rank at the same time. Translated as Senior Storm Unit Leader, Obersturmbannführer was junior to Standartenführer and was the equivalent to Oberstleutnant (Lieutenant Colonel) in the German Army.
Amongst the more notorious holders of the rank of Obersturmbannführer were Rudolf Höss and Adolf Eichmann. Höss was commandant of the infamous Auschwitz concentration camp, whilst Eichmann is generally regarded as a key architect of the Nazi's Endlösung policy in which Auschwitz came to play so major a role.
Repeat, leave well alone.