He was a public figure who should have expected some extra scrutiny thus having a huge incentive to do everything by the book. Instead, Shrem knowingly broke the law by trading with a silk road vendor, going against the good judgement of his own CEO.
The guy is a greedy dumb-ass and Bitcoin would be much better off without the likes of him involved. I would stay well away from anything he does in the future.
The criminal complaint was a tactic of Preet Bharara to further his career. The asshole is chasing easy targets to make himself look good. If he was really an anti-money laundering specialist HSBC wouldn't still be laundering billions of dollars out of banks in New York. Charlie was a victim of Bharara's political aspirations. The massive reduction in the charges filed against him for his plea deal prove it.
http://www.fastcompany.com/3027123/bitcoin-sheriff-of-the-web-preet-bharara