...seems to be repeated misconduct by select prosecutors with no repercussions beyond new trials for the accused. While that, in of itself, is a just solution, that does nothing to ensure justice across the board. The concerns expressed by Judge Kozinksi and others seem quite valid: without any personal consequences to individual prosecutors, there is no barrier to them repeating their improper conduct in court.
Prosecutors are not the same as defense attorneys. Defense attorneys have one responsibility – and that is to zealous represent the interests of their individual clients. Prosecutors have no individual client and represent the people of the state as a whole. Their responsibility is to ensure justice, whatever that may be. It is not for them to adopt a “win at all costs” mentality. The prosecutorial power should never be a game, with the winner being the one who gets the most convictions. Yet it is precisely that mentality that leads to these unfortunate instances of misconduct which results in injustices in several ways: either innocent individuals get convicted by hook or crook, or guilty individuals go free when courts reverse convictions for due process violations.