NYPD Officers Turn Their Backs On Bill De Blasio; Police Unions Say Mayor Has 'Blood' On His Hands [VIDEO]

New York Police officers turned their backs on Mayor Bill De Blasio Saturday, in a gesture of displeasure following the execution-style killing of two of their colleagues. De Blasio was making his way to a press conference at Woodhull Hospital, where the two slain officers, Rafael Ramos and Wenjian Liu, were pronounced dead earlier in the evening.