Provide one shred of physical or documentary evidence that anyone was murdered at Auschwitz. You cannot do it.
Then read about the role played by Nazi Judge Konrad Morgen, who led more that 800 investigations of crimes by the SS in the camps and prosecuted 200+ cases, resulting in many convictions and the executions of two camp commandants.
The Nazis actually prosecuted crime in the camps, as opposed to the US at Abu Graib, for example, on any of the other secret US prisons around the world.
Morgen prosecuted mainly corruption in the camps, an approach which Morgen himself called "a possible way of proceeding." That course was to hit the perpetrators he could with corruption charges, since he couldn't go after them directly for the mass murder and since, in Morgen's view, the debased process inevitably debased those participating in it and would lead them to corrupt activities. When Morgen tried to investigate Maximilian Grabner, head of the Political Department (Gestapo) in Auschwitz, Gestapo Müller summoned him to Gestapo headquarters to chew him out for his having "no understanding of state police matters." Faced with a not-so-senior SS judicial official questioning the state policy of murder of the Jews, Müller went ballistic and threw Morgen out of his office in the midst of his tirade against him. Interestingly, during 1944 he tried to arrest and prosecute Eichmann (!) - on account of the pilfering of a bag of diamonds (likely done by someone else) - using any pretext he could come up with to get at the perpetrators of the FS. He also went after Höss, using the Hodys affair.
Pohl despised Morgen. He repeatedly went to Himmler complaining about Morgen's work and he impeded his investigations. In summer 1944 - at a time when Morgen had filed his report on Buchenwald and prepared an indictment against the defendants, had sent evidence against Eichmann to an SS court, was preparing his case against Grabner at Auschwitz - Pohl issued an order to the KL commandants saying that no SS judges were to be granted access to the camps without the judge having been granted an access card by Pohl. The SS judge for the special court established to try SS cases was at the time warning Morgen to back off - enough that Morgen wrote his fiancee about the poisoned relations between him and the judge. As things heated up, Himmler granted Morgen a promotion - and an enforced 3-week vacation during which he was forbidden to work on his cases. Himmler also had his top legal adviser discuss with Morgen "fundamental questions about the conduct of investigations." A warrant may have been issued for his arrest by the RHSA. In the fall of 1944, at the Buchenwald trial, Morgen felt as though he were the one charged. The outcome of the Buchenwald trial saw Koch receiving the death penalty - but only for corruption, not for illegal killings. Ilse Koch was acquitted. Hoven, a physician at Buchenwald and one of those charged, was not convicted but remained in prison facing re-trial. The Grabner Auschwitz trial was abandoned. Earlier in 1944 Müller, Eichmann's boss, had instructed Morgen not to pursue the case against Eichmann because Eichmann was "carrying out a special secret task of utmost importance entrusted to him by the Führer." And Morgen's case against Höss stalled.
Allied bombing forced Morgen to move his office to Bavaria in the fall. He took his mandated vacation in November and, on his return, was reassigned off his cases to Crakow, which he fled in early 1945 to begin a series of moves to avoid being taken by the Soviets.
Just to be factual here, please tell Charles Graner that no one was prosecuted for the abuse at Abu Ghraib.