When Malloy gets up after being knocked to the ground by the largest of the three suspects in the bar hold-up, the right arm of his uniform is covered with dirt marks from being on the ground. In the next shot, there are no longer any dirt marks on the right arm of his uniform.
Mr. Fine demonstrates that he is a Holocaust survivor by showing a number tattooed on his shoulder, saying he got it at Dachau concentration camp.
But Auschwitz was the only Nazi camp that tattooed numbers on prisoners, and only on the left forearm, never on the shoulder.