> The only illegal thing he did was lie about it so that he could get them their money back.

You're missing the point; giving his investors 'their' money back was the thing he did that was unethical and illegal. If you're a fund manager and the value of your portfolio goes down after making bad bets, you can't just inject your own money into the fund to make it look like you have a positive track record so that you can solicit more outside funds.