An Act relative to accomplice and joint venture criminal liability

HD 456 revises Massachusetts criminal law to clarify accomplice liability. It requires prosecutors to prove beyond reasonable doubt that an accomplice knowingly participated with specific intent to aid a crime, not merely by being present. The bill changes murder sentencing: accomplices in killings (not personally responsible) face 2.5-25 years instead of first-degree murder, while accessories after the fact face up to 10 years. It applies retroactively to past cases, allowing petitioners to seek sentence reevaluation. A 5-year review by the Executive Office of Public Safety will assess sentencing outcomes and judicial interpretation.