Dross
Explorer
A couple of things to think about.
While you know OOC that he is stealing, does the PC know that the rogue is stealing? Making sure it is the rogue is important. As others have said: Alarm, Curse, prestidigitation (colour bright pink, or a hidden mark), physical trap, mark all your items in a hard to locate spot.
You are taking steps to protect yourself since items are going missing. If other PCs have things go missing (especially if the rogue doesn't) help them set traps as well (but always leave something else for yourself).
Has the rogue used any items, or does he sell or give them away? Query rogue over how how got items. If he says "bought them" ask how he got the $$, from where, and when.
Then as others have said, it is in character to expel from the party if not take more drastic action.
Alternatively, find some way to out the rogue as a necromancer, since he has taken (your) tools of the trade, if it is not something you have shown the rest of the party. You just need to be able to deflect any calls of you being one.
While you know OOC that he is stealing, does the PC know that the rogue is stealing? Making sure it is the rogue is important. As others have said: Alarm, Curse, prestidigitation (colour bright pink, or a hidden mark), physical trap, mark all your items in a hard to locate spot.
You are taking steps to protect yourself since items are going missing. If other PCs have things go missing (especially if the rogue doesn't) help them set traps as well (but always leave something else for yourself).
Has the rogue used any items, or does he sell or give them away? Query rogue over how how got items. If he says "bought them" ask how he got the $$, from where, and when.
Then as others have said, it is in character to expel from the party if not take more drastic action.
Alternatively, find some way to out the rogue as a necromancer, since he has taken (your) tools of the trade, if it is not something you have shown the rest of the party. You just need to be able to deflect any calls of you being one.