Prosecutor Complaint
The prosecutor’s role in our adversarial justice system - to obtain convictions, regardless of a defendant’s guilt or innocence - necessarily creates competitiveness in terms of winning cases; but, as stated by the U.S. Supreme Court...
While he may strike hard blows, he is not at liberty to strike foul ones. 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.
- Berger v. United States, 295 U.S. 78 (1935)
Beyond the more typical examples, sometimes prosecutors simply break the law themselves, using their position of authority to further their own personal interests.