Authorities say the co-driver of a semi-truck has died in a fiery crash on Interstate 10 in Southern Arizona. According to the Arizona Department of Public Safety, the semi-truck rolled during the fiery crash on eastbound I-10 between Benson and Willcox at milepost 318 on Thursday morning. DPS says the co-driver of the semi-truck was killed. The freeway is restricted to one lane. DPS says the left lane of I-10 is open, but the right lane and shoulder are closed for clean up.