Rebels take control of Syria, Assad flees country; New photos of a person of interest in CEO murder as manhunt widens; President-elect Trump speaks exclusively with NBC News' Kristen Welker; and more on tonight's broadcast.

New insights emerged about Luigi Mangione, the suspect in the killing of UnitedHealthcare CEO Brian Thompson, including the pain he suffered as the result of a back injury. A former acquaintance in Hawaii described a surfing accident that aggravated the injury. And a former high school friend reacted to the news that Mangione was a suspect. NBC News' Sam Brock reports. Luigi Mangione, the 26-year-old suspect in the killing of UnitedHealthcare CEO Brian Thompson, appeared at an extradition hearing in Pennsylvania and said he will contest extradition to New York, where he faces murder and weapons charges. NBC News' Stephanie Gosk reports. A wildfire fueled by strong Santa Ana winds blew up in Malibu in Southern California, damaging homes and forcing thousands of residents to evacuate. The fire also threatened Pepperdine University. NBC News' Lester Holt reports. Days after the fall of the Assad regime in Syria, thousands of people are searching for relatives who may have been imprisoned, tortured or killed. NBC News' Richard Engel got a look inside one of Syria's most notorious prisons, as families look for loved ones they haven't seen in years. A group of parents has sued Character AI, a Google-backed company, saying the company has failed to protect children from chat bots they claim can be damaging to children. NBC News' Laura Jarrett reports on the companies' responses.