Opening statements began Thursday in the trial of Shawn Laval Smith, the man accused in the stabbing death a 24-year-old woman while she worked alone at a Hancock Park furniture store in Jan. 2022.   The grisly killing unfolded on Jan. 13 while Brianna Kupfer, a UCLA graduate student, was working at Croft House on North La Brea Avenue.   At 1:36 p.m. that day, Kupfer sent a text to a...