Regardless of how unscrupulous this individual was he did not deserve to die. There is no justification taking another persons' life in cold blood.
I still don't know how Americans put up with such a healthcare system though. It might not be perfect but our state-funded system in the UK, paid for by an additional taxation leaves you with no medical bills at all. I know paying more tax is anathema to many americans but you'd save thousands in private bills as a result.
In the current system though I'm not sure how you'd change things with an incoming government built for and by billionaires. It might prove cheaper to emmigrate to Europe.