Which MRPC rule specifically deals with maintaining client confidences after representation ends?

Rule 1.9 of the Model Rules of Professional Conduct specifically addresses the duty of a lawyer to maintain the confidences of former clients. This rule articulates that a lawyer who has formerly represented a client in a matter must not subsequently represent another person in the same or a substantially related matter in which that person's interests are materially adverse to the interests of the former client, unless the former client gives informed consent.

This obligation extends beyond the conclusion of the attorney-client relationship, reinforcing the principle that client confidences and secrets must be preserved even after representation has ended. The rule emphasizes the protection of sensitive information that a client disclosed in the course of representation, which is critical to fostering trust in the attorney-client relationship.

Other options do not focus on the post-representation obligations regarding client confidences. Rule 1.8 primarily deals with conflicts of interest and specific transactions between clients and lawyers, while Rule 1.10 addresses issues of imputed disqualification concerning lawyers within the same firm. Rule 2.4 relates to the role of a lawyer as a third-party neutral and does not cover confidentiality issues. Therefore, Rule 1.9 is the appropriate provision concerning maintaining client confidences after representation has concluded.