In August 1942, two Ukrainian policemen brutally killed an 18-year-old girl, Hanka Prussak, who had been caught sitting on the bench in front of her house in the ghetto after the curfew. Subsequently, in an attempt to improve the reputation of the local Ukrainian police, the Gebietskommissar claimed that the girl had been killed by a Jew, and demanded that the Judenrat either hand over the "killer" or surrender ten hostages. Attempts by the Judenrat to bargain their way out of this demand were unsuccessful. Since it was impossible to find the "Jewish murderer", the Judenrat had no choice but to select ten elderly male and female Jews as hostages. Eventually, seven of them were placed under arrest and held at the Gendarmerie building in Zdołbunów. Following an order given by the Gebietskommissar, Georg Marschall, to Joseph Paur, district Gendarmerie chief of Zdołbunów, the arrestees were taken to the quarries of the cement factory. At this time, one Jew managed to escape. Upon reaching the murder site, the remaining six Jewish hostages were forced into the pit and ordered to lie face down inside it, whereupon they were shot in the back of the head by members of Zdołbunów's Gendarmerie post (headed by Wilhelm Wacker).