A woman looking to help a person in need was robbed by knifepoint Monday night in Casco. At around 8 p.m. near the intersection of County Highways A and C, the woman stopped to see if a motorist on the side of the road needed her help. She instead found a masked man with a knife demanding money. According to the Kewaunee County Sheriff’s Department, the suspect is a white man in his early 20s with a black jacket and ski mask. He was last seen driving north on County Highway C in a dark-colored pickup truck with no cap on it. The Kewaunee County Sheriff’s Department is encouraging people to contact them with any information they might have as they continue their investigation.