MI HB4556

Allows incarcerated individuals who have served at least 10 years to petition the sentencing court for a reduction of their sentence, with petitions eligible to be filed after the tenth year of imprisonment begins.

Requires the Department of Corrections to notify eligible individuals, courts, prosecuting attorneys, and public defense authorities within 30 days after an individual's ninth year of incarceration begins.

Establishes that courts must set resentencing hearings within 45 days (if petitioner has serious medical conditions or prosecutor files petition), 90 days (if served over 20 years or age 55+), or 180 days (otherwise) after petition filing.

Prohibits sentence reductions for individuals convicted of mass shooting offenses (3+ counts of first-degree murder from single incident) and provides discretionary denial for certain child sexual abuse and human trafficking-related convictions.

Creates rebuttable presumptions that sentences must be reduced to time served if medical urgency applies, or reduced by at least 20% if individual poses no meaningful risk to community, with victim notification rights preserved throughout the process.