secret service agent who for three years became part of this massive cyber criminal network defriending masikling to ukraine, turkey, southeast asia to immerse himself into one of the fastest growing criminal screams in the world, these are the cyber criminals who electronically break in, into store store, retailers, any company with credit card information and the undercover agent would pretend to be a buyer and use the stolen numbers and literally create credit cards that looked and act exactly like the card in your pocket. >> and before you even realized your credit card numbers had been stolen, crews were out buying up merchandise and selling it on the black-market. >> how many cards were available, how many credit lines were available? >> millions of credit cards. >> reporter: the secret service was buying up stolen credit cards in bulk in a weekly basis to reel in masik's trust and eventually masik himself. >> did he seem like a criminal? >> some of them came off as looking as a mafia figure or the next big criminal, ordinary individuals. >> after a night out in turkey he brought him ba