A 40-year-old Edwardsburg woman is dead after crashing her vehicle into a tree in Jefferson Township in Cass County. The sheriff’s department tells WSJM News Jennifer Johnson was killed just before 7 last night in the crash on Calvin Hill Street near North Shore Drive. Investigators say she lost control of the car on an icy road and was the only one in the vehicle. Johnson had not been drinking, and was wearing her seat belt. The crash is still under investigation.