FREEPORT — Authorities have released the name of an ATV driver killed in a rollover crash Saturday in Stephenson County.

Gregory P. Ludwig, 74, of Freeport was killed in the Saturday incident.

According to reports, Stephenson County Sheriff’s deputies responded to a wooded area east of 4125 Autumn Lane around 4:05 p.m. for reports of a crash. Once on scene, deputies found the ATV upside down — with the driver underneath, according to the sheriff’s office.

The unnamed driver was pronounced dead at the scene by the Stephenson County Coroner’s Office. The crash remains under investigation, police said.