Illinois State Police District 18 is investigating a single vehicle crash that occurred Sunday morning that resulted in the death of a Nokomis man. 31 year old Justin Gunderson was travelling eastbound on IL-16 when his 1997 GMC Truck left the roadway to the right for an unknown reason. After Gunderson’s truck left the roadway, it struck a concrete culvert causing the vehicle to roll. Gunderson was ejected from the vehicle, and pronounced deceased on the scene. Alcohol is believed to be a factor in the crash. The crash is currently under investigation by the Illinois State Police Traffic Crash Reconstruction Unit.