That's no reason to make a great mystery out of it. You talk like a detective in a novel.
4 seconds sound clip from the The Wolf Man (1941) movie soundboard.
You can hear this line at 00:24:18.741 in the Blu-ray version of the movie.
Quote context
[...]
- We'll talk to you later, Larry. Come on, Doctor.
- Yeah. I'll be down in a minute.
- Now, Larry, will you stop worrying and let me handle this?
- But they're treating me like I was crazy!
- I'm not accusing him of foul play, but, after all, two people are dead, and I am chief constable.
- That's no reason to make a great mystery out of it. You talk like a detective in a novel.
- Now, please, gentlemen. There's a very simple explanation.
- It was dark. Excitement and confusion. The Gypsy was killed.
- What about Bela's bare feet?
- He just didn't have time to put his shoes on.
- And what about this nonexistent wound?
- Larry imagined he'd been bitten. After all, the beast jumped at him and tore his coat to shreds.
[...]