Josef Kollmer was an SS

Schutzstaffel

The Schutzstaffel |Sig runes]]) was a major paramilitary organization under Adolf Hitler and the Nazi Party. Built upon the Nazi ideology, the SS under Heinrich Himmler's command was responsible for many of the crimes against humanity during World War II...

-Obersturmführer

Obersturmführer

Obersturmführer was a paramilitary rank of the Nazi party that was used by the SS and also as a rank of the SA. Translated as “Senior Assault Leader”, the rank of Obersturmführer was first created in 1932 as the result of an expansion of the Sturmabteilung and the need for an additional rank in...

at Auschwitz

Auschwitz concentration camp

Concentration camp Auschwitz was a network of Nazi concentration and extermination camps built and operated by the Third Reich in Polish areas annexed by Nazi Germany during World War II...

. He was prosecuted at the Auschwitz Trial

Auschwitz trial

The Auschwitz trial began on November 24, 1947, in Kraków, when Polish authorities tried 41 former staff of the Auschwitz concentration camps. The trials ended on December 22, 1947....

.

Born in Händlern, Bavaria

Bavaria

Bavaria, formally the Free State of Bavaria is a state of Germany, located in the southeast of Germany. With an area of , it is the largest state by area, forming almost 20% of the total land area of Germany...

, Kollmer was a farmer by trade. He became a member of the SS on January 1, 1935 after having previously spent several years in the German police force. He joined the Nazi party in May 1937. In October 1941 he was drafted into the Waffen-SS

Waffen-SS

The Waffen-SS was a multi-ethnic and multi-national military force of the Third Reich. It constituted the armed wing of the Schutzstaffel or SS, an organ of the Nazi Party. The Waffen-SS saw action throughout World War II and grew from three regiments to over 38 divisions, and served alongside...

 and was assigned to Auschwitz, where he commanded various guard companies until October 1943. He then temporarily transferred to Mittelbau-Dora concentration camp, but returned to Auschwitz in May 1944. Initially he commanded the guard company at Auschwitz main camp, then later the one at Monowitz concentration camp from August to October 1944. During his time at Auschwitz, Kollmer participated in the extermination of Jews in the Birkenau gas chambers, and carried out executions against the shooting wall between blocks 10 and 11 and at the Buna factory.

Kollmer was tried by the Supreme National Tribunal

Supreme National Tribunal

The Supreme National Tribunal was a war crime tribunal active in Poland from 1946 to 1948, with jurisdiction over fascist-hitlerite criminals and traitors to the Polish nation.The tribunal presided over seven high-profile cases ....

 at the Auschwitz Trial in Kraków

Kraków

Kraków also Krakow, or Cracow , is the second largest and one of the oldest cities in Poland. Situated on the Vistula River in the Lesser Poland region, the city dates back to the 7th century. Kraków has traditionally been one of the leading centres of Polish academic, cultural, and artistic life...

 and was sentenced to death

Capital punishment

Capital punishment, the death penalty, or execution is the sentence of death upon a person by the state as a punishment for an offence. Crimes that can result in a death penalty are known as capital crimes or capital offences. The term capital originates from the Latin capitalis, literally...

. His sentence was carried out by hanging

Hanging

Hanging is the lethal suspension of a person by a ligature. The Oxford English Dictionary states that hanging in this sense is "specifically to put to death by suspension by the neck", though it formerly also referred to crucifixion and death by impalement in which the body would remain...

 in Montelupich Prison

Montelupich Prison

Montelupich prison was a prison located in Kraków, which was used by theGestapo throughout World War II. Prisoners in Montelupich included politicalprisoners, members of the SS and Security Service who had been...

, Kraków.