That's probably the way they planned it.
2 seconds sound clip from Longstreet (1971) - Wednesday's Child sitcom.
You can hear this line at 00:39:31.550 in the Blu-ray version of the TV Series.
Quote context
[...]
- We didn't leave anything behind?
- All right, but stay with it, will you?
- We checked out Decker, his wife, Swift.
- No addresses, phone numbers, nothing.
- That's probably the way they planned it.
- Yeah, I know. Maybe I was wrong, maybe I should have called them.
- Don't you think I've thought about that a hundred times?
[...]