Something happens to a man when he puts on a judicial robe, and I think it ought to. The change is very great and requires psychological change withi… - Robert H. Jackson

The prosecutor has more control over life, liberty, and reputation than any other person in America. His discretion is tremendous. He can have citizens investigated and, if he is that kind of person, he can have this done to the tune of public statements and veiled or unveiled intimations. Or the prosecutor may choose a more subtle course and simply have a citizen's friends interviewed. The prosecutor can order arrests, present cases to the grand jury in secret session, and on the basis of his one-sided presentation of the facts, can cause the citizen to be indicted and held for trial. He may dismiss the case before trial, in which case the defense never has a chance to be heard. Or he may go on with a public trial. If he obtains a conviction, the prosecutor can still make recommendations as to sentence, as to whether the prisoner should get probation or a suspended sentence, and after he is put away, as to whether he is a fit subject for parole. While the prosecutor at his best is one of the most beneficent forces in our society, when he acts from malice or other base motives, he is one of the worst.

This Court is forever adding new stories to the temples of constitutional law, and the temples have a way of collapsing when one story too many is added.

Your responsibility in your several districts for law enforcement and for its methods cannot be wholly surrendered to Washington, and ought not to be assumed by a centralized department of justice. It is an unusual and rare instance in which the local district attorney should be superseded in the handling of litigation, except where be requests help of Washington. It is also clear that with his knowledge of local sentiment and opinion, his contact with and intimate knowledge of the views of the court, and his acquaintance with the feelings of the group from which jurors are drawn, it is an unusual case in which his judgment should be overruled. Experience, however, has demonstrated that some measure of centralized control is necessary. In the absence of it different district attorneys were striving for different interpretations or applications of an act, or were pursuing different conceptions of policy. Also, to put it mildly, there were differences in the degree of diligence and zeal in different districts. To promote uniformity of policy and action, to establish some standards of performance, and to make available specialized help, some degree of centralized administration was found necessary.