This is somewhat related to this question, but I don't think it's a duplicate. Also, there's a chance that this would be better suited on Law Stack Exchange. With Trump's attempts to prevent his taxes from being released; some have speculated that it would show things such as tax fraud, money laundering, illegal business practices, etc. But if the tax returns contained evidence of any illegal activity, wouldn't he have already been charged with such things by the IRS when the taxes were first filed?
I understand of course that the tax returns could contain information that is damaging to him in the election, but is it a realistic possibility that they contain actual evidence of illegal activity?