(Columbus) A person was killed following a motorcycle crash in the Town of Columbus Sunday. The Columbia County dispatch center received a report of the accident on County Highway N near Bristol Road around 3:15pm. The preliminary investigation shows that the motorcycle was traveling through the corners of Highway N near the Dane/Columbia County line when the operator left the roadway and entered the ditch. Sheriff Roger Brandner says a passerby began CPR on the driver prior to arrival of emergency services. Life-saving measures were performed by EMS staff but the operator, identified as a Cottage Grove resident, was determined to be deceased at the scene. Brandner says the 50-year-old was not wearing a helmet and that alcohol may have been a factor but speed is not considered to be a cause of the crash. The Columbia County Sheriff’s Office was assisted by the Sun Prairie Fire Department, Deforest EMS, Dane County Sheriff’s Office, U-W Medflight and the Columbia County Medical Examiner’s Office.