In Wisconsin, a person is considered an “adult” for criminal law purposes at age 17. If a person under the age of 17 years commits a criminal act, it is considered a “juvenile offense.” Adult crimes and juvenile crimes are essentially the same. The elements are the same and the burden of proof for the prosecution is still beyond a reasonable doubt. The essential differences between juvenile court and adult court are the punishments and the procedures. Many times, a juvenile accused of crime will be “waived” into adult court.