Obviously, this is not the way jurors should be selected. A problem with notorious cases is that jurors may want to be on the jury too much. Moreover, once there they may set out to carry forth their own agenda. This may or may not involve jury nullification. Jury nullification is when a juror finds a defendant not guilty despite sufficient evidence of guilt based on the facts and the law.
Jury nullification is a power provided to all jurors.
The issue involved in Dougherty and similar cases is whether or not the court should instruct the jury that they have that power. When we talk about nullification, there are several things you must keep in mind. First, it can only be used to acquit, not convict. If a person is convicted although there was not sufficient evidence to do so properly, the judge has the ability to enter a judgment of acquittal and overrule the jury's conviction. Once a jury acquits a defendant, a judge may not overturn it.