Maybe they're both dead.
3 seconds sound clip from the The Searchers (1956) movie soundboard.
You can hear this line at 00:37:58 in the Blu-ray version of the movie.
Quote context
[...]
- Sorry.
- We don't even know if Debbie and Lucy are in this bunch. Maybe they split up.
- They're with 'em, all right. If they're still alive.
- But, if I hear that from you again, I'll fight you, Mr. Edwards!
- Found a main trail, but four of them cut out here and rode on up through that pass.
- How come they'd do that, Ethan?
[...]