I am posting this on behalf of my advisor.
A post-doc in my research group at US told that he'd be going home to meet his family who are in a different country, but after two months he emails that he is quitting. He has the laptop which my advisor paid for and important research data. He hasn't communicated in email that he will return the things he owes. Besides, he was playing tricks by procrastinating his return, even confirming his return tickets, only to finally resign.
What are the legal ways to get the resources as well as the monetary compensation made in his absence back, in case he doesn't respond?
(Note: The research data needs to be surrendered because it belongs to unpublished work from other groups, not because it wasn't backed up.)