SPRINGFIELD, Ill. (AP) — Illinois State Police say they are turning over to a private forensics group the unsolved 1992 slaying of an Iowa-bound college student from New Jersey. WMAQ-TV in Chicago reports the case involving Tammy Zywicki will be reviewed by the Philadelphia-based Vidocq Society. That’s a volunteer group largely of retired forensic and law enforcement professionals.

Tammy Zywicki

Zywicki was 21 and driving to Iowa’s Grinnell College for her senior year in August 1992 when her car broke down along Interstate 80 in north-central Illinois’ LaSalle County. Her stabbed, blanket-wrapped body was found days later and hundreds of miles away along on entrance ramp to Interstate 44 in southwestern Missouri near Joplin.

No one has been charged, and no arrests have been made. Zywicki’s parents now live in Florida.