K. Prasoon and other friends have taken the right position, not to punish the employee for his misconduct, if any, doubly—one with a demand for his resignation, and the other by stopping his terminal benefits.
In fact, there is a legal connotation in such disciplinary matters to the above effect that the employee, as per the canons of 'Natural Justice' applied to him, should not be subjected to 'Double Jeopardy' for the same proved offense. The employer, at his most and best, is however left with only justifiable/reasonable administrative actions, such as placing the employee in an innocuous position or effecting the employee's transfer to some other department/place. Awarding one single punishment, with this administrative course of action, does not by itself amount to double jeopardy highlighted above.
Company Regulations and HR Policies
In any case, what's really intriguing in this trail is, does not the 'Company/Employer In Question' have a set of established regulations/rules/code of conduct/discipline for the employees? A company/employer should have necessary/suitable contractual covenants to cover exigencies also of such cases, in the above scheme of things. The company/employer, notwithstanding a private enterprise in this case, above all still needs to have predeclared 'Legitimate Human Resources (HR) Policies/Systems And Values In Place' to guide its disciplinary matters.
The lack/absence of the above employment elements is precisely the reason for the 'Disguised Disloyalty & attrition movement of the employees towards their organizations. It's not the 'Management Principles' but mostly the 'Street Smartness' and 'Psychofancy,' especially in private enterprises, which is dictating the terms to society. The ill-equipped HRs should do well to introspect, realize, and do something resourceful/valuable to deal with this position of serious concern. One of the old wisest did counsel us to light a little lamp/candle instead of cursing the darkness around a thousand times. For after all, a journey of a thousand miles starts with a single step, as also quoted by another old wisest.
The matter is dealt with elaborately herein because, in essence, this forum is regularly getting cases of employees' alleged delinquency from some of our friends for acceptable solutions thereof, through collective wisdom.