Because Colbert was killed here, then driven back to town in his own car and dumped on the streets.
6 seconds sound clip from the In the Heat of the Night (1967) movie soundboard.
You can hear this line at 01:34:15.092 in the Blu-ray version of the movie.
Quote context
[...]
- You aren't taking me anywhere, you dig?
- You're holding the wrong man!
- Because Colbert was killed here, then driven back to town in his own car and dumped on the streets.
- Sam couldn't have driven two cars.
- You know, Virgil, you are among the chosen few.
- Well, I think that you're the first human being that's ever been in here.
- Well, you can't be too careful, man.
[...]