WYOMING \u2014 A Gillette man was killed early this morning after his pickup truck left the highway and rolled over. Wyoming Highway Patrol troopers were dispatched to milepost 141 on Interstate 90 east of Gillette at around 6:46am today for a single-vehicle rollover crash. A 2001 Dodge Ram was traveling eastbound on Interstate 90 when the driver exited onto Exit 141.\u00a0The Dodge drifted off the left side of the roadway before the driver overcorrected back to the right shoulder where the truck overturned. The driver of the Dodge has been identified as Matthew N. Schmaljohn, 27, of Gillette.\u00a0Schmaljohn was not wearing his seatbelt and succumbed to injuries sustained at the scene of the crash. Inattention or fatigue is being investigated as\u00a0possible contributing\u00a0factors. This\u00a0is the 39th\u00a0fatality on Wyoming\u2019s roadways in 2019 compared to 22 in 2018, 27 in 2017, and 12 in 2016 to date.