A 19-year-old dual United States and Estonian citizen arrested in Finland earlier this month faces federal charges in the U.S. alleging he was a prolific member of the notorious Scattered Spider hacking collective.

According to temporarily unsealed court records obtained by the Chicago Tribune, the suspect (who used the online alias “Bouquet”) helped extort millions of dollars from multiple large corporations worldwide.

The suspected Scattered Spider member, who was allegedly arrested by Finnish law enforcement at Helsinki’s airport on April 10 while attempting to board a flight to Japan, is facing wire fraud, conspiracy, and computer intrusion charges.