Someone stole your precious crystal??
You should known better before you give permissions or privileges to a person.
The fault is yours because u let it happen, This is a game with real life situations and what ever happens in real life happens and in game life, and this has to do with players and clan rules.
Ok the player you are accusing has stolen something that doesn't belong to him ...... spank him maybe?
So my advise is to be more care full from now on with the person`s that you have in your clan and thing`s going on.