https://en.wikipedia.org/wiki/Subsequen ... erg_trials which mentions-
"I once saw DPs beat an SS man and then strap him to the steel gurney of a crematorium. They slid him in the oven, turned on the heat and took him back out. Beat him again, and put him back in until he was burnt alive. I did nothing to stop it. I suppose I could have brandished my weapon or shot in the air, but I was not inclined to do so. Does that make me an accomplice to murder?"[3]
"You know how I got witness statements? I'd go into a village where, say, an American pilot had parachuted and been beaten to death and line everyone up against the wall. Then I'd say, 'Anyone who lies will be shot on the spot.' It never occurred to me that statements taken under duress would be invalid."[3]
and basically every post WWII war-crimes trial conducted in Europe. such as the https://en.wikipedia.org/wiki/Majdanek_trials
However back to the top-
https://en.wikipedia.org/wiki/London_Cage
Alexander Alexander Scotland wrote a postwar memoir entitled London Cage, which was submitted to the War Office in 1950 for purposes of censorship. Scotland was asked to abandon the book, and threatened with a prosecution under the Official Secrets Act, and officers from Special Branch raided his home. The Foreign Office insisted that the book be suppressed altogether as it would help persons “agitating on behalf of war criminals”. An assessment of the manuscript by MI5 listed how Scotland had detailed repeated breaches of the Geneva Convention (1929), including prisoners being forced to kneel while being beaten about the head, forced to stand to attention for up to 26 hours, and threatened with execution and ‘an unnecessary operation’. The book was eventually published in 1957 after a seven-year delay, and after all incriminating material had been redacted. In London Cage, Scotland vigorously denied that violence was used against prisoners, and that confessions were obtained by seizing upon discrepancies in the accounts of prisoners.