I watched de Palma's The Untouchables again last night, and suddenly there was a scene that smelled so much of DitV:

Malone: : You said you wanted to get Capone. Do you really wanna get him? You see what I'm saying is, what are you prepared to do?
Eliot Ness : Anything and everything in my power.
Malone : And THEN what are you prepared to do? If you open the can on these worms you must be prepared to go all the way because they're not gonna give up the fight until one of you is dead.
Eliot Ness : How do you do it then?
Malone : You wanna know how you do it? Here's how, they pull a knife, you pull a gun. He sends one of yours to the hospital, you send on of his to the morgue! That's the Chicago way, and that's how you get Capone! Now do you want to do that? Are you ready to do that?
Eliot Ness : I have sworn to capture this man with all legal powers at my disposal and I will do so.
Malone : Well the Lord hates a coward. Do you know what a blood oath is Mr. Ness?
Eliot Ness : Yes.
Malone : Good, cause you just took one.

Per