Please read my reply to a similar question asked by a banker: Approaching court for revocation of suspension and reinstatement after long suspension.
Please also see: Suspension order not to extend beyond 3 months if charge-sheet is not served, says Supreme Court.
You may also read other articles / replies on this website relating to suspension: http://tilakmarg.com/forum/search_gcse/?q=suspension.
Generally in cases where there is a criminal case registered followed by arrest / custody, suspension may be continued for longer durations. It is not uncommon to see suspension in such cases continuing till the trial in the criminal case is over. It also depends on the facts of the case and the role of the employee in such criminal case.
Normally, there are provisions for review of the suspension at periodic intervals such as 3 months or 6 months. You may check what are the rules in your bank relating to review of the suspension. Also check whether your suspension has been reviewed periodically as per the rules.
Depending upon facts of your case, and in consultation with your local lawyer, you may challenge the continuation of your suspension in the appropriate court / tribunal.
Dr. Ashok Dhamija is a New Delhi based Supreme Court Advocate and author of law books. Read more about him by clicking here. List of his Forum Replies. List of his other articles. List of his Quora Answers. List of his YouTube Videos.