Prosecutors say suspect in UCLA student Brianna Kupfer's murder recorded brutal stabbing

Brianna Kupfer's alleged killer is on trial for her murder two years after the brutal stabbing of the 24-year-old UCLA student. Kupfer, an architectural graduate student, was working alone at Croft House, a boutique furniture store in Los Angeles' Hancock Park, Jan. 13, 2022, when Shawn Laval Smith …