... the primary office performed by appointed counsel parallels the office of privately retained counsel. Although it is true that appointed counsel serves pursuant to statutory authorization and in furtherance of the federal interest in insuring effective representation of criminal defendants, his duty is not to the public at large, except in that general way. His principal responsibility is to serve the undivided interests of his client.Justice Stevens
Ferri v. Akerman
444 U.S. 193, 204 (1979)