IL HB3807

Raises the age threshold for sentencing consideration from under 18 to under 21 years old for all offenses except certain first degree murder cases.

Requires courts to consider nine specific mitigating factors at sentencing for defendants under 21, including age, maturity, peer pressure, family background, rehabilitation potential, and prior criminal history.

Allows courts discretion to sentence defendants under 21 to less than the applicable minimum determinate sentence for their offense, except in certain first degree murder cases.

For first degree murder convictions, sets a mandatory minimum sentence of 40 years of imprisonment for defendants under 21, but allows courts to decline firearm-related sentencing enhancements.

Becomes effective immediately upon passage.