Warsaw, 22 May 1946. Investigating Judge Halina Wereńko, delegated to the Commission for the Investigation of German Crimes, heard the person named below as a witness. Having been advised of the criminal liability for making false declarations and of the significance of the oath, the witness was sworn and testified as follows:
| Name and surname | Czesław Piechocki |
| Parents’ names | Józef and Helena |
| Date of birth | 18 March 1883, Włocławek |
| Occupation | postmaster |
| Education | secondary |
| Place of residence | Warsaw, Ludna Street 4 |
| Religious affiliation | Roman Catholic |
| Criminal record | none |
On 13 May 1943 in Warsaw, the friends of my son Leonard, Adam Lazarek (born 1922) and Kacper Lazarek (born 1925), both secondary school students, sons of Józef and Józefa Lazarek, residing at Wspólna Street 49, having eaten dinner, left their flat at Wspólna Street at 1.30 p.m. and went in the direction of Marszałkowska Street. As soon as they left the gate, a German gendarme who was standing on the opposite pavement called to them and ordered them to enter the courtyard of the house at Wspólna Street 52.
I would like to emphasize that as far as I know neither of my son’s friends belonged to the clandestine organization of the Polish Underground State or was suspected of so belonging.
There were already six men standing by the wall in the courtyard of the house at Wspólna Street 52. I do not know the surnames of those people. The gendarme ordered my son’s friends both to stand by the wall, next to the men who had already been standing there. One of them, Adam I think, seeing that he would be soon executed, rushed to the nearest staircase. The gendarme ran after him, firing a volley of shots and wounding him severely, and then, on the gendarme’s order, Adam Lazarek came out to the courtyard, staggering, and leaned against the wall, shouting “Water!” In response, the gendarme fired a volley of shots and finished him off. Shortly afterwards the remaining seven people were executed by the gendarmes.
A few hours after the execution, a truck arrived at the scene and the corpses were loaded onto it and taken in an unknown direction.
I learned the above-recounted facts from Józefa Lazarek, the mother of the murdered friends of my son. Józef Lazarek, the father of the murdered boys, a secondary school teacher, developed a metal illness following the execution of his sons and couldn’t work any more.
I don’t know the current address of Mr. and Mrs. Lazarek. My son Leonard heard the same account of events from the caretaker of the house at Wspólna Street 52, Jan Włodarczyk (born in 1899 in the village of Zabłotnia, Błonie county, currently residing at Wspólna Street 52).
Włodarczyk witnessed the execution, and he also said that the German gendarmes arrived on 13 May 1943 at the house at Wspólna Street 52 because some meeting of underground activists was to be held there. Allegedly, the six men who had been then executed lived in the house at Wspólna Street 52.
The report was read out.