Hoping to avoid the cigar-cutter penalty, here’s my understanding of the Crimes of Martha. I am by no means an expert, but I did have a SEC compliance role for a former employer. I know a little, but, IANAL.
Bancovic is (was) her advisor in financial matters, and she pays (paid) him for his advice. She probably followed his advice on a daily basis. None of what she did on the Imclone trade really edged into criminal prosecution territory, which is why she wasn’t charged with insider trading.
When the investigation started, she could have said “Oh, Imclone? Yes, I sold it. On the advice of my broker. No I don’t recall the exact reason, but my assistant may have that call recorded. Oh, pooh, that was non-public information? Well, I didn’t know that at the time, I just followed his advice.”
If she had said something similar, she most likely would have faced a civil penalty and paid a fine and disgorgement. Maybe even less. She had a perfectly good reason for her actions. This would have cast enough doubt that proving she knew she was violating securities laws willfully would have been very difficult, if not impossible.
That’s not what she did. She lied and tried to conceal and destroy evidence. That was the criminal action, that was what she got convicted of.
Think of it: Watergate was about not the break-in, but the coverup. Whitewater: same thing. The law doesn’t allow you to destroy evidence that has a bearing on a criminal investigation even if you never really committed a crime in the first place.
Another example (I am edging out of my expertise here, again, IANAL): A man attacks me in a darkened alley, and I fatally stab him with a knife. There will be an investigation of his death. If I throw the knife off a bridge and bribe a witness to lie about the incident, that’s (at least?) two crimes. Never mind the fact that the death could justified as self-defense.