This event scores 23.48 on constitutional damage and 25.01 on distraction/hype with D=-1.53, placing it on List B. Rule of law concerns (3.5) arise from repurposing federal prison infrastructure for civil immigration detention, blurring criminal/civil enforcement boundaries. Civil rights impact (3.5) reflects due process concerns and conditions-of-confinement issues when immigration detainees are held in criminal facilities. Separation of powers (2) involves executive expansion of detention authority. The enforcement_action mechanism adds 15% modifier for direct executive implementation. However, this is operationally reversible administrative action rather than structural constitutional change. B-score is elevated by high outrage potential (7), media appeal (7) of 'prisons for immigrants' framing, novelty (6) of infrastructure repurposing, and strong pattern-match (7) to immigration enforcement narratives. Timing (6) aligns with broader crackdown visibility. Intentionality indicators (8) suggest deliberate signaling of enforcement escalation. The negative D-score indicates hype exceeds constitutional impact, though both are substantial.