At common law, no one could be tried for a felony unless a grand jury were first satisfied that there was good ground for it. The grand jury consisted of not more than twenty-four inhabitants of the county, and in practice never of more than twenty-three, summoned for that purpose to attend at the opening of a term of court. To authorize a prosecution the assent of twelve of them was required. They heard only the case for the prosecution, and heard it in secret, after having been publicly charged by the court as to the nature of the business which would be brought before them. The court appointed one of them to act as their foreman, and he reported back their conclusions in writing, and in one or the other of two forms—by presentment or indictment.

A presentment was a presentation, on their own motion, of an accusation against one or more persons. They were the official representatives of the public before the court, and it might well be that offenses had occurred, and become matters of common notoriety, prosecutions for which no one cared or dared to bring. Such a proceeding was comparatively rare.

The common course was to pass only on such written accusations as others might submit to their consideration. These were called bills of indictment. If the grand jury believed that there were sufficient grounds for upholding any of them, their foreman endorsed it as "A true bill," and it then became an indictment. If, on the other hand, they rejected a bill of indictment as unfounded, the foreman indorsed it as "Not a true bill," or with the Latin term "Ignoramus," and this was the end of it.

The organization and functions of the American grand jury are similar, except that here we have prosecuting attorneys to procure the presence of the necessary witnesses and direct the course of their examination. In the Federal courts almost all criminal accusations, great or small, are, and by the fifth amendment to the Constitution of the United States all charges of infamous crimes must be, prosecuted by presentment or indictment. In most of the States the intervention of a grand jury is requisite only in case of serious offenses; in some only in capital cases. It is obvious that it is less needed here than in England, since here it is not within the power of any private individual to institute criminal proceedings against another at his own will, but they are brought by a public officer commissioned for that very purpose and acting under the grave sense of responsibility which such authority is quite sure to carry with it. The grand jury, however, has its plain uses wherever political feeling leads to public disorder. It has also, since the Civil War, been found an effective restraint in some of the Southern States, whether for good or ill, upon prosecutions for violations of certain laws of the United States, brought against members of a community in which those laws were regarded with general disfavor.

Prosecutions by information are those not founded on a presentment or indictment. The information is a written accusation filed in court by the prosecuting officer. In certain classes of cases, the leave of the court must be first asked in some jurisdictions. It is not necessary that it be supported by any previous statement or complaint under oath. The officer who prepares it acts under an oath of office, and that is deemed sufficient to give probability to whatever charges he may make.

If the defendant has already been bound over by a committing magistrate, such an information may take the place of the original complaint on which the arrest was made. If he has not yet been arrested, or if he was arrested and discharged by such a magistrate, the filing of an information is accompanied by a request for the issue of a warrant for his arrest from the court. Such a paper is called a bench warrant, and is granted whenever necessary, whether upon a presentment, indictment, or information.

An information may be amended by leave of the court at any time. A presentment or indictment cannot be. They, when returned to court, are the work of the grand jury, and they end its work. An amendment of a legal process can logically be made only by the hand which originally prepared it. This rule leads to the escape of many a criminal. If prosecuted by indictment, the case against him must be substantially proved—in whole or part—as there stated, or he goes free. Prosecuting officers therefore naturally prefer to proceed upon information whenever the law permits it.

The intervention of a grand jury is also often the necessary cause of a delay alike prejudicial to the State and to the prisoner. It can only be called in when a court is in session, by which it can be instructed as to its duties and to which it is to report its doings. Months often elapse in every year when no such court is in session. For this reason, in case of a poor man under arrest on a charge of crime, who cannot furnish bail, it would often be much better for him were his liability to be brought to trial to be settled promptly by a single examining magistrate. At the hearing in that case also he has a right to be present and to be heard. Before a grand jury he has no such right.

In most States, the great majority of indictments are against those who have already been committed on a magistrate's warrant to answer to the charge, should an indictment be found. The accused thus has two chances of escape before he can be put on trial for the charge against him: one by a discharge ordered by the committing magistrate, and one by the refusal of the grand jury to return "a true bill." A grand jury is more apt to throw out a charge as groundless than a single magistrate. He feels the full weight of undivided responsibility. If he err by discharging the prisoner, he knows that it may let a guilty man go free, untried. If he err by committing him for trial, he knows that, if innocent, the jury are quite sure to acquit him. He acts also in public. The whole community knows or may know the proofs before him, and will hold him to account accordingly. On the other hand, in the grand jury room all is secret. The prosecuting attorney, if admitted, does not remain while the jurors are deliberating over their decision. No one outside knows who may vote for and who against the return of an indictment. Every opportunity is thus afforded for personal friendship for the accused or business connection with him to have its influence. Judges know this, and in their charge often emphasize the importance and gravity of the duty to be performed. In 1903, the prosecuting officer in one of the small counties in Kentucky had prepared indictments against several men of some local prominence for arson and bribery. A special grand jury was summoned to act upon them. There was reason to expect some reluctance on the part of several. Of the witnesses for the State some were no less reluctant. There was great public excitement in the court town. One witness came there over ninety miles by rail hidden, for fear of his life, in a closed chest in the car of an express company. The grand jury were told by the court that they must make their inquiry a thorough one and indict without fear or favor every person in the county who ought to be indicted. "If," the judge added, "the evidence calls for indictments and you don't make them, they will be made anyway. If you do not do your full duty, I will do mine by assembling another grand jury." They did theirs under these stirring injunctions, and the indictments were promptly found.

After the indictment or information comes the arraignment. This is bringing the defendant before the court and, after the charge made against him has been read, directing him to plead to it. Before the plea is entered, if he has no counsel, he is asked if he desires the aid of one, and if he responds that he does (or should he not, if the court thinks he ought to have counsel), some lawyer will be assigned to that duty. Some of the younger members of the bar who are present are generally desirous of being so assigned to defend those who have no means to employ such assistance. The court ordinarily makes the assignment from among their number, but in grave cases often appoints lawyers of greater experience and reputation. No one who is so assigned is at liberty to decline without showing good cause for excuse. A small fee is often allowed by statute in such cases from the public treasury. Statutes are also common providing that witnesses for the defense may be summoned at the cost of the government, if the defendant satisfies the court that their testimony will be material, and that he is unable to meet this expense.