By Jeremy Herb - 09/20/13 08:11 PM EDT
Harroun had been accused of fighting with Jahbat al Nusra, an al Qaeda-affiliate that is one of the opposition groups battling against Syrian President Bashar Assad’s regime.
The State Department has placed Jahbat al-Nusra on its list of terrorist organizations.
The charges against Harroun alleged that he traveled to Turkey last November, crossed the border into Syria and joined with opposition forces led by al-Nusra and members of the Free Syrian Army in January.
Defense lawyers argued there was confusion over what opposition group Harroun joined in Syria, according to the AP.