More than thirty years ago, in Berger v. United States, Mr. Justice Sutherland described the heavy and multiple responsibility assumed by a prosecutor. The United States Attorney, he asserted, not only must be an advocate for the prosecution, but also must ensure that justice prevails. The Justice stated: "It is as much his duty to refrain from improper methods calculated to produce a wrongful conviction as it is to use every legitimate means to bring about a just one."
David G. Bress,
Professional Ethics in Criminal Trials: A View of Defense Counsel's Responsibility,
Mich. L. Rev.
Available at: https://repository.law.umich.edu/mlr/vol64/iss8/4