You should know it's against the law impersonating a managing editor.
4 seconds sound clip from the The Front Page (1974) movie soundboard.
You can hear this line at 01:28:27 in the Blu-ray version of the movie.
Quote context
[...]
- Hello? Who? Yes, this is Walter Burns.
- What photograph? Of Earl Williams? The one I took? Where?
- God damn it, don't tell me I should know. Just remind me.
- You should know it's against the law impersonating a managing editor.
- I'll give you 10 seconds to hand over Earl Williams.
- Damn it! I know he's around here someplace.
- Aha! Where did this come from?
- Does it belong to Earl Williams?
- Why don't you put an ad in the classifieds? Maybe he'll come around to claim it.
[...]