Tammy Jo Zywicki, 21, left Evanston, Illinois on the afternoon of August 23, 1992, driving to Grinnell College in Iowa and was later seen beside her disabled car near mile marker 83 on Interstate 80 in central Illinois. Witnesses reported a tractor-trailer close to her vehicle and described a tall man with dark, bushy hair; her car was ticketed as abandoned that night and towed the next day. When she did not arrive at college, her family reported her missing on August 24. On September 1, 1992, her body was found along Interstate 44 in Lawrence County, Missouri, wrapped in bedding and a red blanket, bound with duct tape, stabbed to death and sexually assaulted. A Canon 35mm camera and a distinctive musical wristwatch were among items reported missing. Multiple agencies investigated and questioned persons of interest, including long-haul trucker Lonnie Bierbrodt; no arrest has been made and the FBI lists the homicide as unsolved with a reward offered for information.

Did anyone who traveled I-80 or I-44 in late August 1992 see Tammy, her car, or that distinctive truck and driver?