So would locking the cab that is not in use.

Aren't the emergency brake cords on the outside of the engineers' cabs, where anyone can get at them?

It would keep the culprit from making his escape through the unused cab, though.

Presumably it's left accessible because it's an emergency exit?

- Locking a cab down = in an actual emergency you can't escape the damn train.

- All conductor cabins are locked when in or not in use.

- The emergency break is a big red thing on a string that you can pull that is right next to either cab exit that is on the 2 ends of a cab.

Oh. D'oh.