Hicks menyatakan tidak bersalah atas tuduhan persekongkolan, percobaan pembunuhan dan membantu musuh, tapi tuduhan itu dicabut sesudah Mahkamah Agung Amerika Serikat pada Juni menetapkan bahwa mahkamah tentara dalam pengadilan Hicks dan tahanan lain Guantanamo tidak sah.
Hicks had pleaded not guilty to charges of conspiracy, attempted murder and aiding the enemy, but those charges were dropped after the US Supreme Court ruled in June that the military tribunals set up to try Hicks and other Guantanamo Bay inmates were illegal.