Don't lock the stable door after the horse has been stolen

Don't shut the barn door after the horse is stolen

When the steed is stolen, you shut the stable door.

It's no use locking the stable door after the horse has bolted

Don't close the barn door after the horse runs away

If something is wrong, it is like locking the barn door after the horse is stolen, ... But we are still going to pursue it. I want to know what they bought with the money.