Good to hear that this criminal were apprehended at last and FBI can achieve this really means they is not heeding place for those who thought Bitcoin and crypto currency in general will be an avenue for them to perpetrates criminal activities despite the fact that Bitcoin mixers company exist in other to help criminals for there coins to be untraceable.
even though they use the services of a bitcoin mixer, the bitcoin mixer company certainly has the first data before they mix. this might be a reference for the FBI to start tracking him down.
Nothing can escape tracking bitcoin transactions. Those smart criminals will not use bitcoin. Illegal bitcoin transactions by a few criminals and currently there are many other fraudulent methods that need to be wary of.