5th February 2019 From India, Mumbai
Who he may be, damaging/destroying/wrongful use of office information is fall under mis-conduct. The company is at liberty to take legal action even can file FIR in police station in name of the employee involved in sabotage work.
The work done by the employee is not his property rather the property of the comapny for which the said employee was hired and remunarated.
Your friend is lucky enough that the company has not initiated any legal proceeding, once it starts your friend has to pay manyfold than of his pending salary and can be put behind the bar.
6th February 2019 From India, Mumbai