Summary

by John Marshall Harlan Sparf v. United States — Opinion of the Court

Indeed, if a jury may rightfully disregard the direction of the court in matter of law, and determine for themselves what the law is in the particular case before them, it is difficult to perceive any legal ground upon which a verdict of conviction can be set aside by the court as being against law. If it be the function of the jury to decide the law as well the facts,-if the function of the court be only advisory as to the law,-why should the court interfere for the protection of the accused against what it deems an error of the jury in matter of law?
Source: Wikisource

by John Marshall Harlan Sparf v. United States — Opinion of the Court

In its charge to the jury, the court, among other things, said: 'What, then, is murder? There are only two kinds of felonious homicide known to the laws of the United States. One is murder, and the other is manslaughter. There are no degrees of murder.' 'There is no definition of 'murder' by any United States statute. We resort to the common law for that. By the common law, murder is the unlawful killing of a human being in the peace of the state, with malice aforethought, either express or implied.
Source: Wikisource

by John Marshall Harlan Sparf v. United States — Opinion of the Court

But, on the other hand, I do consider that this power and corresponding duty of the court authoritatively to declare the law is one of the highest safeguards of the citizen. The sole end of courts of justice is to enforce the laws uniformly and impartially, without respect of persons or times or the opinions of men. To enforce popular laws is easy. But when an unpopular cause is a just cause; when a law, unpopular in some locality, is to be enforced,-there then comes the strain upon the administration of justice
Source: Wikisource

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