Of the near 100,000 victims who perished within the Mauthausen camp system, many died at this spot - the Genickschussecke (neck shooting corner). The Genickschuss method of shooting a single round into the nape of the neck was used at many concentration camps, where a fake height measuring facility known as a Genickshussanlage (neck shooting facility) was sometimes employed. Such apparatus can be seen today at Buchenwald - see the thread link below.
At Mauthausen, the murderers were also creative in concealing the fate of their prey. The room pictured below is part of the underground bunker and crematorium facility at KZ-Mauthausen, near Linz. Here, under the guise of photographic records, many inmates were murdered by a single shot to the neck. SS staff organised the prisoners into a queue near the entrance where the inmates expecting to have their photographs taken waited. Below ground, a camera was erected near the corner of the room and even covered with a dark blanket to complete the ruse. Then, the prisoner was brought down the stairs, the door was closed and after being positioned in front of the camera, the inmate was shot from behind. Members of the Sonderkommando, waiting in the mortuary next door, were then summoned to hurriedly remove the corpse and clean all traces of blood before the next prisoner was called to enter the underground execution site. A folding table with a trap floor was also used for hangings in this room - the table is currently on display within the memorial museum at Mauthausen and is pictured below.
Link to the Buchenwald thread (see image no.8) - http://www.warrelics.eu/forum/konzen...henwald-89550/