This document summarizes a Supreme Court case regarding the constitutionality of expanding the jurisdiction of the Sandiganbayan, a special anti-graft court in the Philippines. Petitioner Panfilo Lacson and others questioned whether new provisions in Republic Act No. 8249, which expanded the Sandiganbayan's jurisdiction to include cases where any accused (not just principal accused) meet certain ranks or positions, could be applied retroactively to their pending cases related to a 1995 incident. The Supreme Court document outlines the legal arguments on both sides and the background of the related bills passed by Congress and signed into law on the issue.