The jury was not representative of the community and would not provide a fair and impartial trial. In recent years, jury nullification has played a role in the trials of Mayor Marion Barry of Washington, DC for drug use, Oliver North for his role in the Iran-Contra Affair, and Bernhard Goetz for his assault in a New York City subway. In Les Miserables, Victor Hugo highlighted the difference between justice and law. The jury's responsibility is to deliver justice, not to uphold the law. Judges in Maryland and Indiana are required by law to inform the jury of its right to nullification.
Nullification applies just as much in other states, including Pennsylvania.
Judges usually do not inform the jury of this right. Even worse, some judges instruct the jury that it does not have the right to interpret or nullify the law, but only to determine the facts. Near the end of alcohol prohibition, juries refused to convict for alcohol violations.