In this month’s podcast episode of 12:01: The Death Penalty in Context, DPI’s Managing Director Anne Holsinger speaks with Professors Craig Haney and Frank Baumgartner, and DPI’s Staff Attorney Leah Roemer about the legacy of the US Supreme Court’s decision in Roper v. Simmons and the legal and scientific landscape surrounding the use of the death penalty for young adults ages 18-20. Professors Baumgartner and Haney, along with fellow researcher Karen Steele, collaborated on a 2023 study which discusses the legal context and rationale of the Court’s decision in Roper when it barred the death penalty for juveniles under age 18. Ms. Roemer is a major contributor to DPI’s new report, Immature Minds in a “Maturing Society": Roper v. Simmons at 20.