The fellow that was running the show figured they ought to hide it until things cooled off.
8 seconds sound clip from the The Train Robbers movie soundboard.
You can hear this line at 00:08:55 in the Blu-ray version of the movie.
Quote context
[...]
- Don't you think it's about time?
- A train robbery, five years ago. Ten men rode away with half a millionin gold.
- The fellow that was running the show figured they ought to hide it until things cooled off.
- So he took the Fargo box and two of the men and rode south into Mexico.
- Came back alone. Said the other two got killed accidentally.
- He had the misfortune of getting shot.
[...]