Heinrich Luitpold Himmler (October 7, 1900 – May 23, 1945) was a Nazi German politician and head of the Schutzstaffel (SS). He was the second most powerful man in Nazi Germany, after Adolf Hitler. As Reichsführer-SS he oversaw all police and security forces, including the Gestapo.
As overseer of concentration camps, extermination camps, and Einsatzgruppen (literally: task forces, often used as killing squads), Himmler coordinated the killing of millions of Jews, between 200,000 and 500,000 Roma, many prisoners of war, and possibly another three to four million Poles, communists, or other groups whom the Nazis deemed unworthy to live or simply 'in the way', which included homosexuals and those with physical and mental disabilities.
Shortly before the end of the war, he offered to surrender to the Allies if he were spared from prosecution. After being arrested by British forces, he committed suicide before he could be questioned.