On 12 August 1947 in Kraków, a member of the Main Commission for the Investigation of German Crimes in Poland, Appellate Investigative Judge Jan Sehn, acting upon written request of First Prosecutor from the Supreme National Tribunal, this dated 25 April 1947 (file no. NTN 719/47) and in accordance with the provisions of and procedure provided for under the Decree of 10 November 1945 (Journal of Laws of the Republic of Poland No. 51, item 293) in connection with Article 254, 107 and 115 of the Code of Criminal Procedure, interviewed the former inmate of the Auschwitz concentration camp, named below, as a witness, who testified as follows:
| Name and surname | Marcin Kuczwał |
| Age | 61 years old |
| Nationality | Polish |
| Religious affiliation | Roman Catholic |
| Occupation | water system fitter |
| Place of residence | Kraków, Bocheńska Street 8, flat 8 |
During the occupation, I worked at the Rekener installation company. Based in Warsaw, this German company had its branch in Kraków at Dietlowska Street 29. In March 1945, along with other workers, I was sent to the Majdanek concentration camp to install a water supply system. As I was leaving Kraków, I didn’t know that we were going to take part in the construction of the concentration camp.
Upon my arrival in Majdanek, it was no longer possible for me to quit, and I had to work there until the end of December 1943. I was given the task of installing a water supply system within different buildings, including within the crematorium. The crematorium was put into operation in November 1943, along with the incineration of the corpses of the Jews who were murdered in great numbers during one day at the beginning of November 1943. Thousands of them were shot that day. A young, tall man who served as the crematorium chief supervised the way the crematorium operated. Earlier, he had also supervised the burning of the piles of dead bodies. I don’t remember his name. I can’t recognize him in these photographs (the witness has been shown a number of photographs, including the photograph of Muhsfeldt). I don’t remember having ever heard the name Muhsfeldt, and I don’t remember ever having seen the man in the photograph (the witness has been shown Muhsfeldt’s photograph). I would see the crematorium commandant in Majdanek only from afar, and I can’t say if it is the man in the photograph. The SS man who served as the crematorium chief supervised the laborers who were involved in finishing the construction of the crematorium. He constantly urged them [to work faster]. After the crematorium was put into operation, he supervised the work of those who burned corpses. Along with me, fitter Władysław Grabowski from Kraków was also employed in Majdanek.
The report was read out. At this the report was concluded.