Unfortunately executive fraudster do not stop until they get caught.
Once they are found out they are stopped. But do they ever stop before being caught? My opinion is that they continue until they have bled the company dry then they transfer to find the next victim company. Even if they realise that they are close to being discovered they continue on with their nefarious activities.
My article at SSRN outlines the reasons for my assertions based on my recent research about executive fraudsters.