Details from inside the courtroom during Luigi Mangione's arraignment on New York

Luigi Mangione pleaded not guilty Monday morning to the New York state murder and terrorism charges he's facing for allegedly shooting UnitedHealthcare CEO Brian Thompson. CBS News correspondent Lilia Luciano and CBS News legal contributor Caroline Polisi have the latest.

CBS News 24/7 is the premier anchored streaming news service from CBS News and Stations that is available free to everyone with access to the internet and is the destination for breaking news, live events, original reporting and storytelling, and programs from CBS News and Stations' top anchors and correspondents working locally, nationally and around the globe. It is available on more than 30 platforms across mobile, desktop and connected TVs for free, as well as CBSNews.com and Paramount+ and live in 91 countries.

Subscribe to the CBS News YouTube channel: / cbsnews
Watch CBS News 24/7: https://cbsnews.com/live/

Download the CBS News app: https://cbsnews.com/mobile/

Follow CBS News on Instagram: / cbsnews

Like CBS News on Facebook: / cbsnews

Follow CBS News on X: / cbsnews

Subscribe to our newsletters: https://cbsnews.com/newsletters/

Try Paramount+ free: https://paramountplus.com/?ftag=PPM-0...

For video licensing inquiries, contact: licensing@veritone.com