In Smith v. Cain [transcript, PDF; JURIST report], formerly Smith v. Louisiana, the court heard the latest of several allegations of prosecutorial misconduct [SCOTUSblog backgrounder] out of the New Orleans District Attorney's office [official website], in this case whether a series of violations of case law violated Juan Smith's due process rights. Smith's attorney opened with an exhaustive list of impropriety in the case:

In Brady v. Maryland, this Court established the now-familiar principle that the prosecution must hand over all favorable material evidence to the defense before trial. This case presents a flagrant violation of that principle. The Orleans Parish district attorney's office produced almost no relevant evidence to the defense before Petitioner's trial, and Petitioner was convicted of first degree murder based solely on the testimony of a single eyewitness. Unbeknownst to the defense, however, that eyewitness had told the police on multiple occasions that he could not identify any of the perpetrators or, as he put it, that he would not know them if he saw them. The suppression of those statements alone justifies a new trial, but the district attorney's office in this case also engaged in the wholesale suppression of statements of numerous other witnesses, statements that further undermined the sole eyewitness identification of Petitioner and, more broadly, cast doubt on Petitioner's involvement and role in the shooting.