A nationwide vishing scheme was linked back to two men who were incarcerated in a South Georgia state prison. Surprisingly, they managed to pull off a massive voiced-based phishing scam from behind bars using unauthorized cell phones. The two men were recently found guilty of various charges for their fraudulent voice phishing scam that cheated more than 100 people across the nation out of more than $464,000.

According to reporting from WALB, the victims were called by the two inmates who pretended to be law enforcement officers. They informed their targets that they had warrants out for missing jury duty summons.

From there, potential victims were instructed to pay a “bond” in gift cards, reading the numbers off the back of the cards over the phone to the fake officers in order to avoid being arrested. The inmates also informed their targets that they were under gag orders so they could not speak about their warrants until the bond was paid.