When you think of Teenage and Juvenile Crime it is important to remember that the Eighth Amendment of the United States Constitution prohibits the use of cruel and unusual punishment. In 2012, the Supreme Court ruled that it is unconstitutional for states to sentence juveniles offenders convicted of murder to mandatory life sentences without the possibility of parole.
The Police & You - the Fourth Amendment of the U.S. Constitution guarantees "The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures ... and [that] no Warrants shall issue, but upon probable cause, supported by Oath or affirmation ..."
Police & You: Things to Remember When Confronted By Police
Unsurprisingly, one of the leading Teenage and Juvenile Crime involves alcohol. Although illegal at the time, teenage drinking for those of us who grew up in the 1980s was hardly the big deal it is in today's criminal justice system. "Back in the day", police officers exercised discretion and either poured it out, or (I assume) took it back to the station for after the shift. If you were really unlucky in the 80s, the police took you home and you had to face your parents.