Is the wife responsible for husband's theft before marriage?

After 3 years of marriage the wife find out that her husband stole money from the bank he worked for before they were married. Their bank account is frozen. The wife worked during the marriage and all their money are in a joint account at the same bank where the husband worked. Bank wants to handle this matter internally and wants full reimbursement, in return bank will not press charges. They do not have that amount and wife was not aware of any criminal activity of her husband.