The Marshall County Sheriff's Office is investigating a head-on crash.Deputies were called shortly after 6 a.m. Tuesday to Highway 146 and 310th Street near Gilman.A car and a semi-truck were involved. The driver of the car was sent to the hospital by helicopter.The condition of the semi driver is unknown.» Subscribe to 糖心vlog's YouTube page» Download the free 糖心vlog app to get updates on the go: Apple | Google Play