A flirtatious moment, writings on ammunition and a phone offer clues in search for gunman who killed UnitedHealthcare CEO

A photo depicting a hooded man smiling –– with his mask down –– may provide important clues that could help lead to the suspect in the fatal shooting of UnitedHealthcare CEO Brian Thompson.

​ A photo depicting a hooded man smiling –– with his mask down –– may provide important clues that could help lead to the suspect in the fatal shooting of UnitedHealthcare CEO Brian Thompson. Read More Breaking News, Latest News and Videos | CNN