Are you sure?
3 seconds sound clip from the Suddenly (1954) movie soundboard.
You can hear this line at 00:24:45 in the Blu-ray version of the movie.
Quote context
[...]
- Carney. Uh, is this all routine?
- It seems to me to be kind of overboard.
- I mean, all this checking and everything, as though you expected this town to...
- Sheriff. Have you noticed any strangers in town during the past week?
- No.
- Sure I'm sure. I know everybody in this burg.
- We want to know from either you or your deputies the minute any stranger doesn't keep going through.
- Then this isn't routine. No, it isn't.
[...]