In America, issues about the innocence or guilt of a person charged with a crime are decided by American citizens. At trial, jurors are sworn to follow the law of the land, and to review the actions and the statements of the prosecutors and the police, as they decide a defendant’s fate.
Service on a jury is one of the highest and most necessary duties of citizenship. Only a jury made up of American citizens has the power to make a decision on a defendant's innocence or guilt. Judges assume this power only when a defendant waives the right to a trial by jury.
A jury becomes the embodiment of the power of the government. The members of the jury are citizens, from whom the power of the government is derived.
When a criminal charge is filed, a defendant has the right to demand a jury trial.
At trial, American citizens make decisions that matter. They matter very much when the government accuses a person of a crime.