. >> dachau. factory of horrors. dachau near mumplgen, one of the oldest of the nazi prison camps. it's known 1941 to 1944 up to 30,000 people were entombed here at one time. and 30,000 were present when the allies reached dachau. the nazis said it was the prison for political dissenters. habitual criminals and enthusiasts. >> when these scenes were filmed over 1,600 priests representing many denominations still remained alive. they came from germany, poland, czechoslovakia, france, and holland. incoming prison trains arrived carrying more dead than living. those strong enough to travel were brought to dachau from outlying points which were threatened by the allied advance. this is how they looked when they arrived. in many instances, they were loaded in open railway cars and they died of starvation, exposure, dysentery and typhoid. some survive. and when the rescuers arrive, they administered what aid they could. others died after the liberation. they were buried by their fellow prisoners. as in the case of other camps, local townspeople were brought in to view the dead at dachau.

. >> i went to dakot dachau. >> white american youth and final solution. >> white man has nothing, must races have it all. we will get stronger once we hear the call. wow not very subtle. >> and 3,000 people would come hear me sing those leerk those d that was my job. >> that was your job? >> to market this ideology to them. >> were you surprised that you and ralph listened to music that was hateful? >> not at all. it's kind of like the gateway drug for people in the movement. >> according to dylann roof's cousin, he was normal until he started hearing about that white power stuff. >> we were very adamant about the fact that we were being attacked, that our race was going to be killed off the face of the earth that there was a white genocide. >> roof wasn't the only shooter. wade michael page walked into a sikh temple, killing civil and wounding five others. he was a muse sition playing ine band definite hate. studied page's background. >> the music is like any kind of messaging results in calls to action. you have some bands like the angry aryans of the u.s. or midtown boot boys, who a

we did set up war crimes trials in the dachau concentration camp. and that's where we began as act of poetic justice. the first war crimes trials, long before ner emberg on the basis of evidence collected by me and a few other guys who went out into the field and collected the evidence. that's before we ran into the concentration camps. that's a bigger operation. >> how many military trials did you have? >> i don't though because i left. the trials were already on when i was there, but i left and were still going on when i came back a long time later. of was prosecuting at nurm berg. to give you some idea of the flavor of those trials, which i thought they were terrible. they bore very little resemblance to due process of law. and i cons sefess i was partly blame for that behavior. if i had an ss man in my custody and insisted on lying and saying he wasn't there when i had 20 witnesses saying he was there, he usually ended up with a confession. it was not that i had to shoot him through the head in order to get it, but he certainly was of the impres