The rights of the beneficiary to receive an accounting or to bring the trustee in front of the court for review of their actions depends on state statutes and the way that the trust is written.
The way that the trust is written in the program allows for any of the beneficiaries to request an accounting from the trustee at any time.
If the beneficiary is not satisfied with the accounting they've been provided, they can sue the trustee, and the local court where the trustee lives, and request that the judge review the accounting.
If the courts find that something is not right they may remove the trustee and confine the trustee and require them to pay the money back that's been taken.