Pułtusk, 30 April 1947. Judge A. Rudzińska heard the person named below as an unsworn witness. Having been advised of the criminal liability for making false declarations, the witness testified as follows:
| Name and surname | Józef Potocki |
| Age | 54 years old |
| Names of parents | Franciszek and Maria |
| Place of residence | Kacice, Kleszewo municipality, Pułtusk county |
| Occupation | farmer |
| Religious affiliation | Roman Catholic |
| Criminal record | none |
| Relationship to the parties | none |
In April 1943, two days before Easter, the Germans transported me from the prison in Pułtusk to the camp in Pomiechówek, as I was suspected of political activities. I stayed there until 12 November 1943 and then I was deported to Mauthausen.
During my stay in the camp in Pomiechówek, I was interrogated four times by Litke, Zems and Plewko; I don’t know any other surnames. During interrogation, the above-mentioned people beat me with clubs about my whole body, head included. As a result of this beating I sustained wounds. After interrogations they would chain me to the wall. The four interrogations with the chaining to the wall lasted for four days and nights without a break. For the first two days and nights I did not receive any food. During two subsequent days and nights I got 10 decagrams of bread twice.
Other prisoners in the camp were interrogated in the same manner. During interrogations, many people were killed with the clubs. I myself took eight people who had been killed out of the interrogation room, but I know only one surname – Arani from Puszcza Kampinoska.
I saw interrogated people hanging head down. During interrogations people had dogs set on them and dogs were taught to attack the prisoners. Non-commissioned officer Litke was the head of the political department, and non-commissioned officers Zems and Plewko were working in that department. Non-commissioned officer Blachszmit, the work manager, used to beat prisoners and set dogs on them. Ciborowski, Studziński, Mudry, Bross, Prokop, Szade and Olszewski were guards, and they helped to beat prisoners during the interrogations. The worst of them were Ciborowski and Mudry. Fenik was the camp commander, and Meyer was his deputy – they were both officers and they also beat us. Now and then they were present during interrogations and they knew what interrogation methods were being used in the camp.
The following people could testify about this case: Antoni Brodecki, residing in Płońsk county, near the Babuszew railway station; Antoni Sowiński, residing in Nasielsk; Stanisław Pełka, residing in Nasielsk; Paschalis Zadrożny, residing in Zatory, Pułtusk county, and Stanisława Sawidczyk, residing in Olsztyn.