I'm afraid that's out of the question. He's a witness for the prosecution.
3 seconds sound clip from the Dead of Night (1945) movie soundboard.
You can hear this line at 01:13:45.596 in the Blu-ray version of the movie.
Quote context
[...]
- What exactly do you mean by that?
- You'd like to know, wouldn't you? Well, get Hugo back, and perhaps you will.
- Very well, then. Get Hugo back!
- Now you see what I'm up against.
- I'd like to have a talk with that other fellow, Kee.
- I'm afraid that's out of the question. He's a witness for the prosecution.
- Have a look at his statement. I'd like to know what you think. Seems more like your job than mine.
- I knew Maxwell Frere by reputation as an artiste of the highest standing in his and my profession.
- Boy, I haven't seen you for years. Where've you been?
- Oh, back in the States. I just hit town.
[...]

 Dead of Night (1945)
 Dead of Night (1945)  Phantom of the Opera (1943)
 Phantom of the Opera (1943)  Scooby-Doo, Where Are You! (1969)
 Scooby-Doo, Where Are You! (1969)  Halloween III: Season of the Witch (1982)
 Halloween III: Season of the Witch (1982)  Knight Rider (1982)
 Knight Rider (1982)