It will be anti-money laundering. Hes either buying or selling BTC to drug dealers / organized crime.
AML is the charge. He 's a pretty careful guy, though. Maybe it was a one-off bad trade like that. But he's stating now it's a DoHS play for relevance in the face of btc
@NODEfather 3h3 hours ago
https://twitter.com/NODEfather/status/964908384628572160Everyone asking me about why I was arrested for selling Bitcoin for Cash. Homeland Security came to my home to handcuff me. This is their plan to regulate BTC via legislation from a judge. @Potus has lost control of DHS/ICE. DHS is not needed when BTC wins
https://twitter.com/NODEfather/with_replies worth a read
Reading his tweets doesn't show him as careful or even smart. And what Bob said.