The man accused of orchestrating the deadly 2012 Benghazi attack is due in D.C. court Wednesday.
Ahmed Abu Khatallah is facing a terrorism-related charge, but prosecutors say additional charges carrying the death penalty are on the way.
According to court documents, federal prosecutors say Khatallah was armed with a loaded handgun upon his capture last month in Libya. They said Khatallah has no ties to the United States, and called him a serious danger and flight risk to others.
Khatallah is described as a senior leader with Ansar al-Sharia, a known terrorist organization. The day before the terrorist attack, documents say Khatallah voiced opposition to an American facility being in Benghazi.
Documents said Khatallah participated in the Sept. 11, 2012 attacks that resulted in the deaths of four Americans, including U.S. Ambassador Christopher Stevens.
Khatallah has maintained his innocence throughout.