The verdict was delivered by senior judge Thomas Selby Ellis III in the US Eastern District Court of Virginia earlier in the day.
Alexanda Kotey was suspected of being a member of the notorious extremist cell the "Beatles," which was involved in torture and killing of Western hostages in Syria. The group is believed to have beheaded US citizens James Foley, Steven Sotloff and Peter Kassig for Daesh propaganda videos. Kotey is alleged to have acted as a guard for the cell and tortured hostages, including through waterboarding and electric shocks.
Kotey's co-defendant, El Shafee Elsheikh, was sentenced by the jury earlier in the month. Elsheikh, 33, was found guilty on all charges, including hostage-taking, kidnapping, and supporting a terrorist group, for his role in the capture and murder of two journalists and two aid workers from the United States by the terror cell.
*Daesh, also known as ISIS/IS/Islamic State, is a terror group banned in many countries, including Russia.