This amicus brief was written in response to Defendant’s challenge of the retroactivity of Mass. Ge. Laws. ch. 260 §§ 4C & 4C 1/2, which extended the statute of limitations of civil claims for child sex abuse to 35 years. Issues include whether Mass. Gen. Laws. ch. 260, §§ 4C & 4C 1/2 expressly apply to sexual abuse related claims that occurred prior to their enactment; whether sections 4C & 4C 1/2 are constitutional under the United States Constitution; and whether sections 4C & 4C 1/2 are constitutional under the Massachusetts Constitution. The final opinion is Sliney v. Previte, 41 N.E.3d 732 (Mass. 2015).