upheld on appeal to the 3rd Circuit. Jürgen Stroop's trial in 1950 also included significant evidence relating to the concentration camp (Stroop was hanged in Warsaw in 1952). Most of the staff of KL Warschau, however, did not face consequences for the war crimes. In particular, the whereabouts of Nicolaus Herbet, the second commandant of the camp, as well as Schutzhaftlagerführer remained unknown. The IPN's prosecutors inquired about 208 people whom it identified to be staff members of the concentration camp in 2014, but the Ludwigsburg office only sent information about a fraction of them because of staffing issues related to processing the request of this breadth. In January 2017, IPN's prosecutors speculated that some SS officers involved in KL Warschau might be still alive, but decided to discontinue the investigation due to the fact the prosecutors had no confirmation of this. Discredited extermination camp story Hypothesis Despite the availability of reliable information about the Warsaw concentration camp, in the 1980s a since-discredited legend or conspiracy theory developed concerning the camp. Maria Trzcińska, a Polish judge who served in 1974–1996 as a member of the Chief Commission for Investigation of Hitlerite Crimes in Poland (named Chief Commission for Investigation of Crimes against the Polish Nation after 1991), was assigned to investigate German documents that her counterparts in Ludwigsburg had found. In mid-1988, testimony began to emerge suggesting that the concentration camp was also located near Warszawa Zachodnia railway station, more than away from Gęsia Street, and included gas chambers; these witnesses said that other camps also existed in the vicinity of the camp's generally recognised area. The earliest mention of the gas chambers appeared in the early 1970s in an issue of Perspektywy, a Polish weekly political magazine discontinued in 1990. Thereafter Trzcińska advocated commemoration of the concentration camp's victims, based on the testimony from the late 1980s. In 2002 Trzcińska published a book, Obóz zagłady w centrum Warszawy. Konzentrationslager Warschau (The Extermination Camp in the Centre of Warsaw: Konzentrazionslager Warschau). According to Jan Żaryn, when the idea of a monument to the victims of the Warsaw concentration camp approached fruition, the interested parties were unable to agree on inscriptions to be placed on it, so Trzcińska requested that the Institute of National Remembrance (IPN) verify which version was correct. The institute's conclusions, published in a book by Bogusław Kopka, however, diverged so strongly from hers that she retracted her