The criminal trial of South Sudan's suspended vice president has opened in the capital. Riek Machar appeared Monday for the first time since he was placed under house arrest in March. Machar and seven others face charges of crimes against humanity, murder, conspiracy, terrorism, destruction of public property and military assets. President Salva Kiir suspended Machar as his vice president earlier this month. Justice authorities say Machar faces criminal charges for his alleged role in an attack on a garrison of government troops earlier this year.