How will mistrial affect other Freddie Gray prosecutions?

Aired: 12/16/2015 | 0:04:24 | Clip
The trial for the first officer charged in the death of Freddie Gray has ended in a mistrial. The jury deliberated for 15 hours over three days before a judge in Baltimore declared a hung jury in the case against Officer William Porter. William Brangham joins Gwen Ifill from outside the courthouse in Baltimore for an update.