WYOMING \u2013 A South Dakota man and the only occupant in a one-vehicle rollover crash that was not wearing a seatbelt, was killed Thursday outside of Lyman, Wyoming. Wyoming Highway Patrol was dispatched to the scene of a one-vehicle rollover on Interstate 80 at milepost 32 west of Lyman on Thursday, February 7 at approximately 12:28pm. Troopers report a 2001 Chevrolet Silverado was traveling east on Interstate 80 when the vehicle drifted off the left side of the roadway and overturned. The driver of the Chevrolet has been identified as 51-year-old Victorville, California resident Alfonso Ortiz.\u00a0Ortiz was wearing his seatbelt and transported to Evanston Regional Hospital for injuries sustained in the crash. A passenger in the front has been identified as 40-year-old Victorville, California resident Julio Hernandez.\u00a0Hernandez was wearing his seatbelt and transported to the Evanston Regional Hospital for injuries sustained in the crash. A passenger in the backseat of the Chevrolet has been identified as Theodore Earring, 37, of Batesland, South Dakota. Earring\u00a0was not wearing his seatbelt and succumbed to his injuries at the scene of the crash. Driving too fast for road conditions is being investigated as a contributing factor.\u00a0 The road conditions were slick at the time of the crash. This is the 15th\u00a0fatality on Wyoming\u2019s highways in 2019 compared to 8 in 2018, 9 in 2017, and 6 in 2016 to date.