It sounds like you may need to attack the trust. It may have been unethical for a person acting under a power of attorney to write a trust, naming themselves as Trustee and beneficiary. You can also present the will to probate, along with your application for letters testamentary. You will need to consult directly with counsel in your area, to complete these tasks. Either way, you and your attorney can find out what the one brother has done, and how best to make things right.
Good luck
