Search for "insider trading convictions". They're not rare, and often result in jail time.
Are most of the inside traders that get caught non-professional investors, because the pros know how to escape detection? Are the convictions a small fraction of the number of crimes? Is the SEC too focused on crimes that are easy to prosecute and ignoring more important systemic issues? I'd say yes to all, but the SEC is far from toothless in this type of case.
