A few years ago on a cruise we sat at a table with a doctor who said he was in charge of all United Healthcare insurance approvals. This guy didn't just mention he had to sometimes refuse people care, he was absolutely giddy about it and took sadistic pleasure in seeing other people suffer. We moved to a different table to get away from him.
I guess we'll find out eventually, but I've got to wonder if the shooter was pushed over the edge after someone close to him died due to refusal of care by United Healthcare.