I was watching The Maltese Falcon and there's a scene when Dundy, a cop, tells Sam Spade (who Dundy thinks may have murdered someone) the following:
Well, you know me, Spade. If you did it, or if you didn't, you'll get a square deal from me and most of the breaks. Don't know if I blame you as much - a man that killed your partner, but that won't stop me from nailing you.
I'm kind of confused by "you'll get a square deal from me and most of the breaks." I know "square deal" usually means "fair deal," but I'm not sure how that fits in here given that Dundy is threatening Sam, and I'm entirely unsure of what "most of the breaks" means.