Wisconsin Judicial Determination of Probable Cause is a legal procedure used to determine whether there is enough evidence to charge a person with a crime. This determination is made by a judge in a Wisconsin court using the standard of "probable cause." Probable cause is defined as a reasonable belief that a person is guilty of a crime based on the facts presented to the court. There are two types of Wisconsin Judicial Determination of Probable Cause: Preliminary Hearings and Grand Jury Hearings. A Preliminary Hearing is a hearing held by a judge to determine if there is enough evidence to charge a person with a crime and proceed to trial. A Grand Jury Hearing is a hearing held by a grand jury to determine if there is enough evidence to charge a person with a crime and proceed to trial.