Cops can get tunnel vision. If there's anyone capable of walking right up to but not crossing the "insider trading line" it's going to be a lawyer that specializes in insider trading. If there's anyone that's going to be arrested as a false positive for insider trading it's going to be someone walking right up to but not crossing the line.

I dunno if his lawyer is just very optimistic but “We look forward to defending him with respect to these allegations,” is lawyer speak for "I have a mountain of evidence that is going to make these people look like fools."

IMO whether he's insider trading or just barely not it's a stupid risk to take either way.

Obviously this (and every other comment around here) are just speculation at this point since we have no good details.