
Quoting
jk
offering something is not the same as delivering something so unless there is something that proves some share in the company was in fact transferred to your friend, "she" would be correct that your friend is not an owner in any way.
so if I have people send me texts using the name God and I buy some business cards identifying me as God I somehow have a legal claim that I am God?
Same thing applies
You have not gotten past proving he actually was a co-owner.
Even if he was a co-owner, the actions could be considered criminal. If he did not have the authority to do what he did, yes, it can be seen as a criminal matter and no, not all owners of a company have the right to damage company property. As a shareholder of a few companies I am technically a co-owner of those companies. Car to guess what would happen to me if I destroyed company property?