The legal and compliance chief for Bulgaria-based crypto company OneCoin has been charged with running a pyramid scheme that conned global investors out of $4 billion.

Prosecutors say Irina Dilkinska helped Mark Scott, a former equity partner at the law firm Locke Lord, launder $400 million in proceeds from the scam. She was arrested Monday in Bulgaria and extradited to the United States on Tuesday, where she faces the same charges as her alleged co-conspirator Scott, who was convicted of conspiracy to commit money laundering and bank fraud in 2019.