Lead: The Justice Department announced an investigation into confrontations at a Turning Point USA event at the University of California, Berkeley, after videos and campus reporting documented large demonstrations and one violent altercation. The federal inquiry follows university statements and local accounts describing dozens of protesters confronting event attendees. UC Berkeley officials said the event saw mostly peaceful protest but confirmed at least one violent incident; the Justice Department cited security concerns in launching its review. The move escalates federal scrutiny of campus events and free-speech disputes, and it comes amid a broader national debate over how public universities manage politically charged programming. Campus safety offices, general counsels and student-affairs teams will be watching for DOJ findings and guidance. The probe could influence future university decisions on permitted events, security protocols, and how campuses balance free-expression rights with emergency-response and public-safety obligations.