Kenneth Slack of Boise died after a one-vehicle accident at approximately 12:35 a.m. on Idaho Highway 78 near Marsing.
Slack, 64, was eastbound when he lost control of a Ford Expedition and rolled off of the right shoulder, according to an Idaho State Police release. He was pronounced dead at the scene.
Slack was wearing his seatbelt at the time of the crash. The incident remains under investigation.