Authorities Identify New Person of Interest in 34-Year-Old Tammy Zywicki Cold Case
Illinois State Police and the FBI are seeking public assistance 34 years after the kidnapping and murder of Tammy Zywicki, a native of Greenville, South Carolina. While investigating the case, a new person of interest, Theresa Belenske, has been identified.…
Greenville Spartanburg Asheville Anderson, SC, August 23, 2026 —
Illinois State Police and the FBI have announced a new person of interest in the 34-year-old cold case of Tammy Zywicki, a native of Greenville, South Carolina, whose kidnapping and murder remain unsolved. Authorities are seeking the public’s assistance in connection with the case.
The newly identified person of interest is Theresa Belenske, who died in 2014. Investigators believe Belenske may have been traveling with an unknown semi-truck driver. This individual was reportedly in the vicinity of Interstate 80 in Illinois around the time Zywicki disappeared in August 1992.
Tammy Zywicki’s abandoned vehicle was discovered on Interstate 80 in Illinois. Her body was found in Missouri a short time later. The investigation into her disappearance and subsequent death has been ongoing for over three decades.
Law enforcement agencies are appealing to the public for any information that might shed light on Belenske’s associations or the identity of the semi-truck driver who may have been with her. Information that could help piece together the events of August 1992 is being requested.
Story summarized from the original created by FOX Carolina News Staff on www.foxcarolina.com, see more information here.
