NYC gunman issued warning moments before killing two NYPD officers
Amateur video captured the frantic scene as paramedics desperately tried to save the lives of officers Wenjian Liu and Rafael..
CBS News
Amateur video captured the frantic scene as paramedics desperately tried to save the lives of officers Wenjian Liu and Rafael..
At a news conference Saturday, Mayor Bill de Blasio said the "execution-style" killings of two NYPD officers was an attack on the..