What is the importance of the Maniac's documents in the play, Accidental Death of an Anarchist?

The Maniac's papers contain documentation of his history of madness, as well as a list of his "crimes" of impersonation. Bertozzo uses them as evidence against the Maniac, while it's the Maniac's retrieval of them from Bertozzo's desk that catalyzes the event that sets the action of the play in motion. In other words, if he hadn't gone back to get the papers, the Maniac wouldn't have answered Bertozzo's telephone; wouldn't have learned about the impending arrival of the judge to conduct the inquiry into the Anarchist's death; and wouldn't be inspired to impersonate the judge.