An Act relative to Proportionality in Joint Venture Sentencing

This bill creates a new "accomplice murder" category (M.G.L. Ch. 274 § 2A) for people convicted of murder under a "joint venture" theory who aided in a killing but weren't the principal perpetrator. It directly affects incarcerated individuals convicted of first or second-degree murder under this theory, allowing them to petition courts for resentencing. Key mechanisms include requiring prosecutors to notify eligible individuals within 90 days, establishing a petition process with court hearings, and shifting the burden of proof to prosecutors to show ineligibility. The bill also mandates annual reporting to the judiciary on petition outcomes, including demographic data and sentencing results.