When someone under 18 is accused of breaking the law, the case is usually handled in juvenile justice court — not the same adult criminal court you see on TV. That’s a really important distinction. The whole system works differently, the rules are different, and the outcomes tend to focus more on rehabilitation than punishment. (Note: rules vary by state — what’s true in California may differ where you live.)
At the federal level, it’s even spelled out clearly: charges against anyone who committed a federal crime before their 18th birthday must start as a delinquency proceeding — not an adult criminal prosecution. So the default isn’t adult court. It’s juvenile court first.
But here’s where it gets complicated. Prosecutors can try to move a case to adult court — and in some situations, they don’t even need to ask. Some states have laws that automatically put certain offenses under adult court jurisdiction, regardless of the defendant’s age. Other states set a minimum age for transfer, and prosecutors have to go through a formal process to make it happen.
That formal process matters. When a transfer to adult court isn’t automatic, prosecutors generally have to file the case and justify why adult court is appropriate — often based on the seriousness of the offense, the age of the person, or their prior record. It’s not a rubber stamp. There’s a hearing. Someone has to make the argument.
The rules also vary a lot depending on where you live. Every state sets its own age of criminal responsibility, its own rules about when transfer to adult court is even an option, and its own minimums. What’s true in one state might be completely different two states over. You can find a breakdown of how each state handles this at the Interstate Commission for Juveniles Age Matrix.
Bottom line: if you’re under 18, juvenile court is where things are supposed to start. Adult court is the exception, not the default — and it usually takes a formal legal process to get there.