Modifies provisions relating to juvenile proceedings

HB 592 modifies Missouri's juvenile court procedures by generally prohibiting the detention of minors under 18 in adult facilities, except when a court transfers them to adult court for serious offenses. It requires a court hearing for juveniles aged 12-18 charged with specific violent crimes (like murder or assault) or certain drug offenses, and automatically transfers 18-21-year-olds to adult court upon arrest for new offenses. The bill also clarifies that juveniles who misrepresent their age cannot avoid prosecution, and evidence collected during the misrepresentation period can be used in adult proceedings. These changes directly affect minors facing criminal charges in Missouri juvenile courts and the officials handling their cases.