Why finding the suspected CEO killer is harder than you might think

He gunned down UnitedHealthcare’s CEO on a sidewalk in America’s largest city, where thousands of surveillance cameras monitor millions of people every day. But the man who shot Brian Thompson keeps evading capture.

​ He gunned down UnitedHealthcare’s CEO on a sidewalk in America’s largest city, where thousands of surveillance cameras monitor millions of people every day. But the man who shot Brian Thompson keeps evading capture. Read More Breaking News, Latest News and Videos | CNN