MSNBC Live with José Díaz-Balart 12/23/14

New video shows gunman at Brooklyn mall before shooting NYPD officers

New York City officials are calling for calm following the murder of two police officers. Msnbc’s Adam Reiss reports on the latest developments, and Patrisse Cullors, co-founder of the movement Black Lives Matter, joins the conversation. ... more Duration: {{video.duration.momentjs}}