MA S1179

Creates new "accomplice murder" offense for individuals who aid in a killing but are not the principal perpetrator, with sentences of 2.5 to 25 years imprisonment instead of full murder penalties

Allows persons convicted of murder under joint venture theory to petition for resentencing, with prosecutors required to notify incarcerated individuals of eligibility within 90-120 days of the law's passage

Places burden on prosecution to prove beyond a reasonable doubt that petitioner is ineligible for resentencing; if prosecution fails, conviction is vacated and petitioner is resentenced

Requires credit for time served and allows up to 3 years of post-sentence parole supervision for resentenced individuals

Mandates annual reporting by the Attorney General on petition statistics including numbers filed, granted, and denied, plus demographic data on petitioners