The Chełmno trials were a series of consecutive war-crime trials of the Chełmno extermination camp personnel, held in Poland and in Germany following World War II. The cases were decided almost twenty years apart. The first judicial trial of the former SS men – members of the SS-Sonderkommando Kulmhof – took place in 1945 at the District Court in Łódź, Poland. The subsequent four trials, held in Bonn, Germany, began in 1962 and concluded three years later, in 1965 in Cologne.

A number of camp officials, gas-van operators and SS guards, were arraigned before the court on charges of war crimes and crimes against humanity committed at Chełmno (a.k.a. Kulmhof) in occupied Poland in the period between December 1941 and January 1945. The evidence against the accused, including testimonies by surviving witnesses, former prisoners, and mechanics attending to repair needs of the SS, was examined in Poland by Judge Władysław Bednarz of the Łódź District Court (Sąd Okręgowy w Łodzi).^[2] Three convicted defendants were sentenced to death,^[3] including the camp deputy commandant Oberscharführer Walter Piller (wrongly, Filer); the gas van operator Hauptscharführer Hermann Gielow (Gilow), as well as Bruno Israel from Ordnungspolizei (Order Police), his sentence was later commuted to life. All three were members of the SS Special Detachment Kulmhof responsible for the extermination of Jews and non-Jews during the Holocaust in occupied Poland.^[4]

In the years 1962–65, a dozen SS-men from Kulmhof were arraigned before the German court (Landgericht) in Bonn, RFN. They were charged with the murder of 180,000 Jews in the camp.^[5] The jury deliberations continued for three years, with sentences ranging from 13 months and 2 weeks to 13 years' imprisonment. Half of the defendants were cleared of all charges and released by Germany.^[6][7]

After liberation by the Soviet Army, the new government of Poland began its official investigation into the Chełmno war crimes on May 24, 1945.^[8] Although most Germans fled, Piller and Gielow were soon captured by the Soviets and brought back.^[9]

Notably, the trial of Holocaust perpetrators from Chełmno was unlike any other war-crimes trial, because the camp had been essentially eradicated by the SS, along with most traces of the mass murder. Truckloads of ashes of its victims were dumped in the Warta river daily, the "palace" was blown up with rubble removed to foundations, mobile gas-chambers and loot were driven back to Berlin, written records were destroyed, including train departure records. There was nothing to see for the commissars, or draw interest.^[10] Some of the key evidence was mistakenly discarded in the trash in 1945 (i.e. over 5,000 pairs of damaged shoes from a destroyed synagogue in Koło), or hauled away as usable materials, including wooden fencing and cremation grids; few people were aware of its importance.^[8] By comparison, other former death camps were overflowing with direct evidence of war-crimes, as in the case of the Majdanek trial decided several months before.^[11]

Judge Bednarz soon ordered excavation of the waste in a Schlosslager burn pit. About 24,200 spoons, 4,500 knives, and 2,500 forks were found, among pots, pans, eyeglasses and many other half-burned items in the debris.^[8] It was also known that most of the victims were Jews from the Łódź Ghetto, where chronicles of ghetto operations were found; in addition, non-Jewish Poles, Soviet prisoners, about 5,000 Gypsies, and whole transports of children had been deported to Chełmno where they were murdered. The SS Master Sergeant Walter Piller testified about the final phase of the camp operation, including 1944 deportations from Łódź.^[12] To circumvent the Nazi destruction of records and evidence, Judge Bednarz used Łódź ghetto records and estimates to arrive at the number of victims. Based on ghetto statistics together with testimonies, he estimated some 350,000 victims. He did not account for the period of camp inactivity.^[13] The range of estimated victims presented at the 1962 trial in Bonn was 180,000 with 152,000 as the lowest acceptable number.^[14]

The first Chełmno trial in Poland established many critical details from the camp history, but also revealed the operation of mobile gas chambers, which used exhaust fumes as the killing agent, diverted into sheet metal-lined vans. The names of SS officials and commanders at the camp were established, including the SS-Hauptsturmführer Herbert Lange and the SS-Hauptsturmführer Hans Bothmann who had vanished. Both men were later found to have committed suicide.^[14][15]

Eleven indicted suspects from Chełmno were arraigned at the Special Criminal Court in Bonn, RFN (Landgericht Bonn) in 1962–1965 on charges of complicity to the murder of 180,000 Jews.^[3] A total of four trials were held. Later observers referred to at least one of them as a judicial farce.^[7] Genocide was not in the criminal code of Nazi Germany and the court ruled that it could not be applied retroactively. Depositions were not sufficient to secure convictions. There was little physical evidence remaining at the crime scene. No victims' bodies to examine: their ashes had been carried downriver and out to sea.^[5][20]

The most severe penalties of 15 years were given to Gustav Laabs, SS Hauptscharführer, a gas van operator, and Alois Häfele, SS Untersturmführer, a camp Hauskommando leader. The latter's sentence was reduced by two years on appeal because he reportedly gave cigarettes to some of the walking dead. Half of the defendants were cleared of all charges and released.^[3][6] Oberscharführer Gustaw Fiedler, from Polizeiwachtkommando, was tried in 1965 in Cologne and sentenced to 13½ months imprisonment.

The first camp commandant, SS Sturmbannführer Herbert Lange, was killed in action on April 20, 1945, near Berlin. The second head of Chełmno, Hauptsturmführer Hans Bothmann who made substantial improvements to the killing method in the final phase of the camp operation, committed suicide in British custody in April 1946.^[14][23]

The last person charged in connection with the crimes at Chełmno was a Pole, Henryk Mania. He was one of eight Polish prisoners who worked with the camp Sonderkommando. Mania had been originally imprisoned after being accused of attempting to poison a German.^[24] These eight prisoners has previously worked at a sonderkommando at Fort VII prison where they would dispose of dead prisoners. The men were then transferred to Chełmno after being selected by Herbert Lange^[25] Fifty-six years after the end of World War II, he was convicted as an accessory to murder.^[26][27]

His investigation, begun in 1956, was renewed in 1991 by the Institute of National Remembrance. He was tried in a 2001 court case in Poznań. The collapse of several communist regimes and release of new records made it possible. Mania was found guilty of helping to load prisoners into gas-vans and collecting their watches and jewellery, which he also stole for himself. He was sentenced to eight years' imprisonment, with consideration given to his advanced age.^[28]

• Auschwitz trial held in Kraków, Poland in 1947 against 40 SS-staff of the Auschwitz concentration camp death factory
• Belsen trial
• Belzec trial before the 1st Munich District Court in the mid-1960s of the eight SS-men of the Belzec extermination camp command
• Dachau trials, held within the walls of the former Dachau concentration camp, 1945–1948
• Frankfurt Auschwitz trials
• Majdanek trials, the longest Nazi war crimes trial in history, spanning over 30 years
• Mauthausen-Gusen camp trials
• Ravensbrück trial
• Sobibor trial, held in Hagen, Germany in 1965, concerning the Sobibor extermination camp officials
• Treblinka trials in Düsseldorf, Germany