With the help of collaborators, the GFP also mounted operations to systematically burn down homes and entire villages. The GFP was also responsible for summarily executing prisoners before they could be liberated by the advancing Red Army. For example, in 1943 a GFP report to SS and Police Leader William Krichbaum stated that 21,000 people had been killed "some in combat, and many shot after interrogation" on the Eastern Front.