On 25 January 1946 in Radom, an Investigating Judge of the II District of the Regional Court in Radom with its seat in Radom interviewed the person mentioned hereunder as a witness, without taking an oath. Having been advised of the criminal liability for making false declarations, the witness testified as follows:
| Name and surname | Józef Kozłowski |
| Age | 27 years old |
| Parents’ names | Jan and Agnieszka |
| Place of residence | Wincentów, commune of Wielogóra |
| Occupation | blacksmith |
| Religion | Roman Catholic |
| Criminal record | none |
| Relationship to the parties | none |
I didn’t live in Firlej during the German occupation. In the autumn of 1943, I took up residence in Wincentów. Then, however, my family was expelled for the whole winter, for the Germans were burning bodies in the sands of Firlej and removed all the local residents whose houses were standing near this location. I returned to my home in the spring of 1944. From this time on, practically every other day I heard the sound of gunshots from the direction of the sands. But I never once witnessed an execution.
In the summer of 1944 I was taken by the Germans and forced to work on the burying of bodies. I was accompanied by a dozen or so residents from local townships. I myself buried the bodies of three men, however when talking with the others I learned that the total number of murdered victims was around 40. They had been killed in Firlej on that day in the morning. The corpses had been laid out in one small valley. The Germans who supervised the burials ordered us to distribute the bodies throughout the field.
The executions were held right until the Germans fled. I don’t remember the last execution and cannot say when it took place.
The report was read out.