The death of Tammy Zywicki confounded police and raised fears for young women traveling alone. The 21-year-old was on her way to Grinnell College in Iowa when she had car trouble along Interstate 80 in LaSalle County. Her body was discovered a week later along another interstate in Missouri. She had been stabbed to death.
After years of theories and suspects, no arrests have been made. One witness reported seeing a semi-truck and its driver with Zywicki and her disabled car.
Illinois State Police and the FBI are asking anyone who might have information to come forward. They say they continue to explore new leads, examining over 200 items of evidence and retesting some with DNA technology. A $50,000 reward is offered for help in identifying who is responsible.
