There is no hard and fast rules that the bank has to reinstate you just becasue the criminal case against you had been decided in your favor by acquittig you.
A supreme court judgment states: that Court Can Quash Disciplinary Proceedings Considering Acquittal In Criminal Case On Same Charges.
The Supreme Court in recent judgment discussed the validity of disciplinary proceedings when it is based on same evidence/ witnesses/ circumstances in a criminal case that ended up in acquittal."...mere acquittal by a criminal court will not confer on the employee a right to claim any benefit, including reinstatement.
Court expressed that when the accused is acquitted after full consideration of the prosecution case and the prosecution miserably fails to prove the charges levelled against the accused, it can possibly be said that the accused was honourably acquitted.
If the bank is of the view that the purpose of the departmental proceedings is to keep persons, who are guilty of serious misconduct or dereliction of duty or who are guilty of grave cases of moral turpitude, out of the department, if found necessary, because they pollute the department and thus terminated as per the inquiry report in the departmental inquiry, then the employee's request to reinstate may not be entertained by the employer just because he was acquitted.