Chauvin's attorneys blame drugs,witnesses in Floyd's death

The murder trial of former police officer Derek Chauvin opened in Minneapolis with dramatic video of his fatal encounter with George Floyd. It showed Floyd pinned by Chauvin's knee on his neck - for nearly nine and a half minutes. Lawyers for the prosecution and defense began to lay out their cases, with the latter arguing drugs and health problems caused Floyd's death. Yamiche Alcindor reports.