 CBS News Brief. Breaking this hour, four prison guards in Missouri have been charged with murder and a fifth manslaughter after the death of a black man in custody in December. He died after officers pepper sprayed him in the face and then covered his face with a mask. President Biden gave a rousing speech in Raleigh after his subpar debate performance last night, the first for 2024 with former President Donald Trump. CBS's Weijia Jiang on what's next.