This is because:
* Juveniles are generally not allowed to serve on juries. The legal system typically requires jurors to be adults with specific qualifications.
* Juvenile justice proceedings are often handled differently than adult criminal trials. They may not involve a jury at all, and instead rely on a judge or a panel of experts to make decisions.
While the concept of a "juvenile jury" might seem interesting in theory, it's not something that is actually practiced in current legal systems.