He taught cops how to fight crypto crime. Now he's accused of running a $100 million dark web drug market.

• A Taiwanese crypto expert is accused of running a $100 million dark web drug market.
• Feds say he operated the drug marketplace and blackmailed its users in its final days.
• Just two months ago, he lectured police on tracing cryptocurrency and fighting cybercrime.

A 23-year-old Taiwanese crypto expert known for posting his qualifications on LinkedIn, working at an embassy, and lecturing police officers on cybercrime, may have been leading a questionable double life.