You need to petition the court to review his acts and/or file for a civil injunction. I suggest acting quickly since it has already been 9 months.
Thomas A. Schaeffer, Esq. Law Office of Juarez and Schaeffer PO Box 16216, San Diego, CA 92105 (619) 804-4327 www.jslaw.org This posting is provided for "informational purposes" only and should not be relied upon as "legal advice." Nothing transmitted from this posting constitutes the establishment of an attorney-client relationship. Applicability of the legal principals discussed here may differ substantially in individual situations or in different States.
As Trustee he owes the beneficiaries a fiduciary duty. It appears that he is breaching that duty. I recommend you retain an experienced estate administration/litigation attorney to review the matter and take whatever actions are required to either put your brother in line with the terms of the Trust and the Probate Code or have him removed.
No legal representation exists by virtue of this answer. It is recommended that you contact an attorney directly for a more complete response.