There are countless books, testimonies, studies, analyzes, films, documentaries and even novels about the "Final Solution." Mainly, much has been treated extermination camps themselves, the incredible bureaucratic and logistical organization-wide state necessary for their implementation. Nazi criminals who took part in it at all levels and we talked a lot in all areas, from simple drafting instructions to monstrous their implementation on the ground in the most terrifying details. But we often forget that the Final Solution began well before Auswithz and Treblinka, not industrially and much more "individual", so to say. From the invasion of Russia in June 1941 appointed special commandos killers Einsatzgruppen, began the eradication of the Jews by shooting the whole families, men, women, old people and children. This was the "Holocaust by bullets". Among these groups of killers, he also had to many members of the "Ordnungspolizei" (Orpo), the police of the Reich, whose militarized units are made from non-police personnel mobilized for active service at the front and compound many middle-aged men. These units are involved in all kinds of actions of "law enforcement" in the occupied territories including numerous massacres of Jews. This book tells the story of the 101st Reserve Battalion of the German police in Poland on the basis of numerous testimonies of former members after the war during various interrogations and trial. It reveals how men who are not of the SS, who are not trained and indoctrinated young wolves more than that by the National Socialist propaganda, which come from different backgrounds popular, have a family and business completely completely normal, are in no way intended in their daily lives to become monsters, can gradually develop into formidable mass killers. A detailed analysis of all scenarios, personalities, behaviors and evolutionary characters, contradictory reactions during operations is conducted in a rigorous manner based on some theories of mechanisms of violence inherent to the human condition. This book, beyond the evidence and detailed descriptions and appalling crimes committed, is an invaluable source of reflection on the Nature of Man, and what each of us, even in the most peaceful and least likely to perversion and violence, could become in exceptional political circumstances. A painful meditation and unfortunately still relevant.