Who Was UnitedHealthcare CEO Brian Thompson?

New details are emerging about the UnitedHealthcare executive who was gunned down. Brian Thompson was known to many as B.T. and he had worked his way up the ranks in his 20 years at the company. Friends and co-workers remember the 50-year-old as "whip smart" and "likeable." Some are expressing surprise that the executive did not have personal security with him at the time of the shooting. Inside Edition's Les Trent has more.