The Wrong Man:
Does the real thief appear in some early scenes?

In "Finding the Right Man in The Wrong Man," Marshal Deutelbaum suggests that "the real thief is often visible in the film as he and Balestrero cross paths. Balestrero actually bumps into Daniel outside the Victor Moore Arcade while on his way to the insurance office inside. . . ."

A close look at the actual frames suggests that this may be partly true, and that Hitchcock almost certainly intended the bumping episode to establish the ironic motif of similarly-dressed men in a New York January.
Above: Balestrero enters the Victor Moore Arcade. The actor who bumps him seems not to be Richard Robbins, who played Daniel. However, he is dressed in a coat and hat identical to what Daniels wears at the end of the film. So it seems likely that Hitchcock did intend the irony of paths crossing just before Balestrero is implicated in a crime committed by the other man.
Deutelbaum's essay also locates two other scenes where he believes Daniel is seen. Above, the scene outside the liquor store where Manny is taken for identification. The man passing is clearly not the actual robber.