The law is very clear on what is a crime and what isn't. So when he misused his funds, he committed a crime. And he was prosecuted and convicted for it. Doesn't matter if in the end he cured cancer: he still committed a crime.

I have a feeling that since most people have never dealt with the justice system, they fail to appreciate just how black and white it really is. While the movies/TV do portray cases where "extenuating circumstances" help the case, most cases are pretty straightforward.