Duffey and four others were found guilty last August on multiple bank robbery and weapons charges for at least 21 holdups in North Texas. Two others pleaded guilty before a trial.
The group made up a bank robbery gang called the "Scarecrow Bandits" that robbed banks in 2008, stealing more than $300,000.
They were called "Scarecrow Bandits" because of loose shirts and floppy hats worn during some of the first robberies.
