Ali Shukri Amin had gained notoriety for running the @AmreekiWitness Twitter account (now suspended), and dragging the U.S. State Department into a war of words online.
Between last June and this February, the teenager gained more than 4,000 followers, and over the course of around 7,000 tweets, defended and celebrated the brutal terrorism of ISIS.
According to a statement by the U.S. Department of Justice, Amin also taught others to use Bitcoin to cover up their funding of the group, and incited another Virginia teenager to travel to Syria to take up arms.
He could face a maximum penalty of 15 years in prison.
Amin was arrested in February, and one of his teacher’s later described him as “a great kid with real potential.”