Pennsylvania's Attorney General Michelle Henry appointed Michael Untermeyer as a special prosecutor to investigate and prosecute crimes on the SEPTA public transit system in Philadelphia in accordance with Pennsylvania Act 40 of 2023. The Commonwealth Court ruled Act 40 constitutional, allowing the appointment to proceed. Untermeyer, a Philadelphia attorney with extensive prosecutorial experience, was selected following rigorous criteria, including residing in Philadelphia County and having five years of criminal prosecution experience in Pennsylvania. Philadelphia District Attorney Larry Krasner's legal challenge against Act 40 was rejected by the court, leading to his plan to appeal to the Pennsylvania Supreme Court, claiming the law undermines democracy and public safety, accusing it of being politically motivated rather than safety-oriented.