For a while, don't take these views as a legal opinion, rather a logical conclusion based on the circumstances you explained.
First of all, he is a deserter:
- i) an absconder
- ii) has been on probation
- iii) no information about his whereabouts
- iv) there is no prior/advance notice to quit
- v) he has not qualified for any FnF settlement
- vi) no idea about the properties of your company which were in his possession and he didn't return to you, and so on.
Therefore, just calculate his 10 days' salary, adjust/forfeit it against his above liabilities (you can keep a working sheet showing the sum of these dues attached to his salary slip), and send a claim for the balance by issuing him a notice of termination to his last known address, after following the necessary procedures, and close the matter. Not worth pondering over any more.