Can a person still be chargesheeted or penalised even after compulsory retirement from Govt. service?

A friend of mine was compulsorarily retired from Food Corporation of India just a fortnight prior to his retirement. He is apprehensive that the FCI management, might chargesheet and penalise him for the irregularities, he never committed, even after the retirement from the service. Can any body guide him in this regard, Please oblige and guide him.