News tonight: UnitedHealthcare CEO killed & more

LiveNOW's Andrew Craft takes you through the biggest stories and top news headlines of the day, including the UnitedHealthcare CEO Brian Thompson shot and killed outside his hotel in New York City, a news report that President-elect Trump is considering replacing Pete Hegseth with Ron DeSantis for Defense Secretary, a school shooting in California leaves two children injured and a gunman dead, plus other top stories.