Police scramble to find gunman responsible for killing UnitedHealthcare CEO. Here’s what we know

Police are searching for a gunman on the loose after shooting and killing UnitedHealthcare CEO Brian Thompson in what police described as a bold and deliberate attack in the heart of New York City.

​ Police are searching for a gunman on the loose after shooting and killing UnitedHealthcare CEO Brian Thompson in what police described as a bold and deliberate attack in the heart of New York City. Read More Breaking News, Latest News and Videos | CNN