Will the employer know if I go to jail and find a job? Why

I think you will know. If the employer checks your personal credit file, it will definitely know. If it is just some small units or private companies, it will not be so strict. If it is a large company, it will definitely check. Yes, it is better for the unit to do more than to do less. Many employers do not trust reeducation-through-labor personnel and feel they are unreliable. This is the role of personal behavior and credit.