How little Sievers knew about concentration camps is seen from Document NO-935. Sievers asks to be sent the exact address of the camp and of the commandant of Natzweiler. This letter is particularly worthy of notice.
As for the question whether and to what extent Sievers had knowledge of the performance of Lost experiments in the Natzweiler concentration camp, the following can be stated:
Ferdinand Holl, witness for the prosecution, when giving evidence on 3 January 1947, said nothing about Sievers’ taking part in any way in the performance of the Lost experiments at the Natzweiler concentration camp. The experimenters were Dr. Hirt and officers of the Luftwaffe. The witness Holl did not mention Sievers at all. If Sievers, who wore SS uniform, had become known at all in connection with the Lost experiments, this witness would certainly have made some such statement, especially as he was dispensary assistant [Revierkapo] and prisoners’ guard in the so-called Ahnenerbe block in the Natzweiler concentration camp. (German Tr. pp. 1051-1059.)
The witness Grandjean too, who was at the Natzweiler concentration camp hospital as medical assistant from April 1944 on, knows nothing of Sievers’ presence at the Natzweiler concentration camp or of any connection between Sievers and the Lost experiments. (Tr. p. 1099 ff.)
Sievers was in Natzweiler concentration camp on 25 January 1943 and also visited the barracks where the experimental persons for the Lost experiments were housed. Dr. Wimmer showed Sievers some of the experimental persons with their forearms in bandages. There were about 10 persons altogether who gave the impression of being quite lively. One of the experimental subjects was just having his bandage changed, and Sievers saw that the place being treated on the arm was covered with a scab. Dr. Wimmer reported nothing about fatal incidents. On the other hand, by questioning the experimental subjects himself, Sievers found that they volunteered for those experiments after a lecture by Professor Hirt. Sievers also learned that from Dr. Hirt himself, who at the end of the experiments confirmed that he had sent to the camp commandant a report on the good behavior of the prisoners with a recommendation for their release. (German Tr. pp. 5732-33.) The lecture which Hirt had previously delivered to the experimental persons is also confirmed by the witness Holl. (German Tr. pp. 1051-1059.) This was the only visit Sievers paid to the experimental subjects of the Lost experiments. After 25 January 1943 Sievers never went to Natzweiler again. This is already known from his diary entries.
Sievers attached a certain danger to the experiments, but, not being a physician, he was in no position to judge exactly from the experiments and the way in which they were carried out whether there was reason to be prepared for fatal results. In March 1943 Sievers asked Dr. Hirt whether any experimental subjects had died. Hirt admitted two deaths which, he remarked, however, had no connection with the Lost experiments. (German Tr. pp. 5732-33.)
The statement of the witness Nales, heard in the session of 30 April 1947, deserves special attention. This witness confirmed that the experimental subjects who had reported for the “Burning Experiments” were volunteers. The witness thereby confirmed Sievers’ statement of 10 April 1947. (German Tr. pp. 5732-33.) The witness admitted under cross-examination that Professor Dr. Hirt, as well as the SS camp physician, explained to the experimental subjects the nature of the planned experiments. It may be that the SS camp physician did not precisely state the actual danger of the experiments. But it may certainly be supposed that Dr. Hirt described the nature of the planned experiments more closely in his instructions, which are also confirmed by the witness Holl. Here Sievers had just as little to do with the choice of experimental subjects as in all the other cases. He was present neither at the lecture of the camp physician nor at that of Dr. Hirt. He could and had to rely on what Dr. Hirt told him concerning the question of volunteering.
4. In the case in question, Sievers was again not in a position to give instructions or orders on the carrying out of the Lost experiments. Neither did he do so. In as far as he came into contact with the Lost experiments, he only forwarded correspondence and did subordinate administrative work, which had no decisive or important influence on the experiments carried out by Dr. Hirt.
5. The knowledge that the experiments could exceed certain limits or become inhuman existed neither before they began nor in the course of the experiments.
We still have to examine whether Sievers did not receive, through some report or other, more exact knowledge of the course of the experiments. As a result of the experiments carried out by Dr. Hirt and Dr. Wimmer, the “Proposed Treatment of Poison-Gas Injuries Caused by Lost” was produced. (NO-099, Pros. Ex. 268.) From this report nothing at all is to be learned of the course of the experiments in its effect on the experimental subjects. Since no further report exists, the correctness of Sievers’ statement must be accepted, according to which he knew no more of the Lost experiments than what he had seen and heard himself at Natzweiler. There was nothing in that to make him believe in criminal experiments.