Here is how he did it. First he bought a long black leather trench-coat (known to be worn by Gestapo operatives). Then he purchased a tommy gun to look even more menacingly like a member of the Gestapo. Next he walked into the ghetto one sunny day and rounded up 125 Jews who he instructed to walk out of the Ghetto with him, their hands up behind their necks as if they were under his arrest. He cut a fearsome figure. No one, either Nazi or Jew, dared ask him any questions. He then delivered the Jews to the people waiting to hide them. Marching behind Graebe they expected to be executed and instead were given their freedom and their lives.