34-Year Cold Case: New Lead in Tammy Zywicki Murder

In a significant development for a 34-year-old cold case, the Illinois State Police and the FBI have reportedly uncovered a new lead in the murder of Tammy J. Zywicki. Zywicki was last seen on August 23, 1992, with her car abandoned on Interstate 80 in LaSalle County, Illinois. She was en route to college in Grinnell, Iowa, but never arrived. Her body was discovered on September 1, 1992, along Interstate 44 in rural Missouri, having been fatally stabbed. Authorities are re-examining approximately 200 pieces of evidence, utilizing modern DNA technology to advance the investigation. A semi-truck driver seen near Zywicki's vehicle is a key focus. Investigators are also seeking information about Theresa "Teri" Belenski (maiden name Theresa Vega), described as a person of interest who may have been traveling with the unknown truck driver prior to Zywicki's death. Belenski, who has ties to California cities, is not a suspect but a crucial figure for investigators to locate and interview regarding her movements during the late 1980s through the mid-1990s. The FBI is offering a reward of up to $50,000 for information leading to the identification of those responsible for Zywicki's murder.