Attached on the right is an eyewitness account from 1939 of the daily goings-on at Hitler's Plötzensee Prison as told by Jan Valtin (alias of Richard Julius Hermann Krebs: 1905 - 1951), one of the few inmates to make his way out of that highly inclusive address and tell the tale. Valtin was a communist in the German resistance movement who later escaped to New York and wrote a book about his experiences in Nazi Germany.
"The prisoner who has served his sentence is usually not released; he is surrendered to the Gestapo for an indefinite term in one of the concentration camps, preferably Sachsenhausen or Buchenwald. Incurable hard cases are sent to Dachau... "
Click here to read about the inmate rebellions that took place at Auschwitz, Sobibor and Triblinka.