In this case you may approach the Court but the common understanding in cases of cheating in Employer-Employee cases are that of dismissing the person as stated by you. Based on the cheating that has taken place and the facts, the Court will produce a judgement. If it is a small case, the dismissal of the employee is punishment enough. Therefore, you may approach the Court however, the product of you approaching the Court cannot be declared here. You may refer to the case of Plastene Polyfilms Limited where a case was filed agaisnt an employee for corporate espionage.
Please remeber to understand the facts and circumstances of the case and cautiously proceed.
Hope this helps, Thank You.