Bryan Burwell, federal prosecutors contend, ran with a bank robbery team whose members armed themselves with fully automatic firearms to intimidate Washington police during a months-long crime spree in 2004.

A federal trial judge sentenced Burwell to 11 years and three months in prison for his role in the robberies, which received widespread public attention for their violence. For his use of the machine gun — a two-handled, foreign-made AK-47 military rifle — Burwell received an additional 30 years behind bars.