Well, what if a person committed crimes which paid really well? If he ended up with a ton of money, he would need to come up with some sort of cover story, in fact, he would probably have to come up with a number of stories and anything out on the net that people could Google might poke holes in these stories.
His behavior was consistent with hiding something, and the most logical thing would be criminal activity since: accountants are not known for being multi-millionaires, the children of prison inmates are not known for being the beneficiaries of societies opportunities, and it doesn’t sound as though this “real estate developer” actually developed enough real estate to make the kind of money that he made.
But, as I stated on another thread, going back to basics: Do we have video of the perp actually firing the shots with the weapon the claim he was using?