The number of jurors required to find a defendant not guilty depends on the specific legal system and the jurisdiction in which the trial is taking place. In many countries, including the United States, the decision to find a defendant not guilty or guilty is typically made by the entire jury, not just one juror.
In the United States federal courts and many state courts, criminal juries usually consist of 12 jurors. In some states, however, criminal juries may consist of fewer jurors, such as six or ten. The verdict in a criminal trial is typically reached by a unanimous decision of the jurors. In other words, all jurors must agree on whether the defendant is guilty or not guilty.
In some situations, a hung jury may occur, meaning that the jurors are unable to reach a unanimous decision. When a hung jury is declared, the case may be retried with a new jury.
It's important to note that legal systems vary worldwide, so the number of jurors and the rules for reaching a verdict may differ in different countries and jurisdictions.