The U.S. Department of Justice has initiated a civil forfeiture lawsuit to seize over $225 million in cryptocurrency assets linked to investment fraud and money laundering. Filed in the federal court of the District of Columbia, the case represents the largest crypto-related seizure in the history of the U.S. Secret Service. The investigation, led by the Secret Service and the FBI, employed blockchain analysis to trace the funds through a complex network of transactions designed to obscure their origins. Tether reportedly played a role in assisting the investigation.