That's the problem with organized crime, it's organized, and the law always catches up to them because there's an organized trail to follow.
Imagine all the Russia money coming in during the campaign when Trump's attorney was VP of Trump Organization. Can't claim attorney client privilege if he's VP, Trump's surrogate on TV, in house counsel and Trump's private attorney the seperate legal records he'd have to legally keep aren't sustainable
Longtime Trump attorney hires lawyer in Russia probe - CNNPolitics.com
"Cohen served as executive vice president and special counsel at the Trump Organization during Trump's presidential campaign and did not hold a formal title in the campaign."