Mass. Gen. Laws ch. 265 § 18
Whoever, after having been convicted of the crime of assault upon a person sixty years or older with intent to rob or murder while being armed with a dangerous weapon, commits a second or subsequent such crime, shall be punished by imprisonment for not less than two years. Said sentence shall not be reduced until two years of said sentence have been served nor shall the person convicted be eligible for probation, parole, furlough, work release or receive any deduction from his sentence for good conduct until he shall have served two years of such sentence; provided, however, that the commissioner of correction may, on the recommendation of the warden, superintendent, or other person in charge of a correctional institution, or the administrator of a county correctional institution, grant to said offender a temporary release in the custody of an officer of such institution for the following purposes only: to attend the funeral of next of kin or spouse; to visit a critically ill close relative or spouse; or to obtain emergency medical services unavailable at said institution. The provisions of section eighty-seven of chapter two hundred and seventy-six relating to the power of the court to place certain offenders on probation shall not apply to any person 18 years of age or over charged with a violation of this subsection. Whoever, after having been convicted of the crime of assault upon a person 60 years or older with intent to rob or murder while armed with a firearm, as defined in commits a second or subsequent such crime shall be punished by imprisonment in the state prison for not less than 20 years.
Mass. Gen. Laws ch. 265, § 265:18