Here's the scene of Purvis going to Hoover and resigning, which hopefully was filmed and will appear later in either a 'deleted scenes' dvd special feature or in the Director's Cut of the movie (which Michael Mann *loves* to do):
PUBLIC ENEMIES
by
Ronan Bennett
revisions by
Michael Mann and Ann Biderman
current revisions by
Michael Mann
11/04/07
CUT TO:
INT. CLYDE TOLSON'S OUTER OFFICE - MELVIN PURVIS - DAY
waits. It looks like he's been waiting for a while. People who pass act like he is invisible. They look right through him.
TOLSON
The director will see you now.
INT. HOOVER'S OFFICE - HOOVER - DAY
Purvis stands in front of the desk. On the right of the desk is a plaster death mask of John Dillinger.
HOOVER
(without looking up)
Agent Purvis.
PURVIS
Yes sir.
HOOVER
(sees Purvis stare at death mask)
A medical student in the morgue made that cast of Dillinger's face. It's a reminder of the war we continue to make against the punks and hoodlums . . .
Purvis looks at Hoover. This was the golden boy who Hoover came to despise.
PURVIS
One thing I learned was that Dillinger was an Outlaw and my Adversary. But he was no punk. And he was no hoodlum.
(beat)
Another is that I have no future in your Bureau. And I don't desire one. I quit.
Purvis tosses his badge on Hoover's desk and walks out. Hoover couldn't care less.