The Illinois Supreme Court on Thursday upheld the constitutionality of the state’s juvenile code that denies jury trials to first-time juvenile offenders who have been charged with first-degree murder.Under the Juvenile Court Act, habitual juvenile offenders and violent juvenile offenders can be tried before a jury, while a first-time offender charged with first-degree murder can’t choose to have his or her case tried before a jury.Respondent Destiny P., then a 14-year-old first-time offender with no criminal …