The Cambridge Post of the Highway Patrol is investigating a fatal accident in Guernsey County. It happened Wednesday just before 5:00 pm. Troopers say 30-year-old Robert Huston Jr. of Freeport was traveling north on Repik Road south of U-S 22 on a dirt bike when it went off the right side of the road and struck several trees. The Patrol says Huston was not wearing a helmet at the time of the crash and was pronounced dead at the scene. The accident remains under investigation.