“The attorney-client privilege ranks among the oldest and most established evidentiary privileges known to our law. The common law, however, has recognized an exception to the privilege when a trustee obtains legal advice related to the exercise of fiduciary duties. In such cases, courts have held, the trustee cannot withhold attorney-client communications from the beneficiary of the trust. In this case, we consider whether the fiduciary exception applies to the general trust relationship between the United States and the Indian tribes.”
“We hold that it does not. Although the Government’s responsibilities with respect to the management of funds belonging to Indian tribes bear some resemblance to those of a private trustee, this analogy cannot be taken too far. The trust obligations of the United States to the Indian tribes are established and governed by statute rather than the common law, and in fulfilling its statutory duties, the Government acts not as a private trustee but pursuant to its sovereign interest in the execution of federal law. The reasons for the fiduciary exception—that the trustee has no independent interest in trust administration, and that the trustee is subject to a general common-law duty of disclosure—do not apply in this context.”
