On 15 September 1947 in Jelenia Góra, investigating judge from the District Court in Jelenia Góra with its seat in Jelenia Góra, Judge T. Szewczyk, with the participation of a reporter, certified trainee judge M. Rouba, heard the person named below as a witness, without taking an oath. Having been advised of the criminal liability for making false declarations, this pursuant to Art. 107–115 of the Code of Criminal Procedure, the witness testified as follows:
| Name and surname | Irena Biernacka |
| Age | 25 years old |
| Parents’ names | Onufry and Wiktoria |
| Place of residence | Podgórzyn, Żołnierska Street 102, Jelenia Góra district |
| Occupation | office worker |
| Criminal record | none |
| Relationship to the parties | none |
I know Maria Mandl from the camp in Ravensbrück from the period between 18 October 1941 and the time of her departure for Auschwitz, that is approximately the spring of 1943. At first she held the post of Aufseherin [overseer], and from February 1942 up to the end of her stay in Ravensbrück she was in the rank of Oberaufseherin.
As Aufseherin, Maria Mandl behaved in a bestial manner. She beat the prisoners for no reason at all and prolonged their working hours at her own whim. In the first week after she had been appointed Oberaufseherin, she significantly diminished food rations for the entire camp. On her orders, the daily roll calls were lengthened.
In 1942, on Maria Mandl’s orders, the entire women’s camp was deprived of food for four Sundays. It was a repressive measure connected with the discovery of some civilian clothes in the sewers.
While inspecting the blocks, [Maria Mandl] provoked the prisoners and beat them for no reason whatsoever. She imposed severe punishment even for the slightest transgression of the regulations. She was particularly hostile towards Polish women.
Maria Mandl’s transfer to the newly established Auschwitz camp should be viewed as a step taken by the camp authorities in recognition of her achievements.
This is my testimony, which I signed after it was read out to me.