Investigators Identify New Person of Interest in 1992 Tammy Zywicki Murder Case

Investigators have identified a new person of interest in the 34-year-old kidnapping and murder of Iowa college student Tammy Zywicki. Illinois State Police and the FBI named Theresa "Teri" Belenske, formerly known as Theresa Vega, as someone who may connect to an unidentified truck driver long suspected in the case. The FBI is offering up to $50,000 for information leading to the person or people responsible for Zywicki's death.
Tammy Zywicki vanished 34 years ago, and the case has gone unsolved despite sustained investigative efforts. WLKY reported that authorities have now identified Belenske as a potential link to the truck driver who has been a focus of the investigation for years. Investigators are seeking details about Belenske's activities and associates from the late 1980s through the mid-1990s — the period surrounding Zywicki's disappearance.
The FBI is now asking the public for help solving the case. The agency is offering a $50,000 reward for details that lead to identifying those responsible for Zywicki's murder. KETV noted that this renewed push suggests investigators believe people in the community may still hold key information about events from decades ago.
The unidentified truck driver has long been central to the investigation, according to WAPT. Belenske's connection to this person may provide the breakthrough investigators need. Authorities are particularly interested in learning more about who Belenske knew and what she did during the late 1980s and early 1990s — a critical window for the case.
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