Somewhere around mile marker 83, near a little town called North Utica, a white Pontiac is pulled over onto the shoulder.

It's a 1985 Pontiac T1000 with New Jersey plates. And behind the wheel is a Twenty-one-year-old college senior named Tammy. Tammy was on the last leg of a 1,500 mile drive from her family's home in New Jersey headed to her college in Iowa.

Somewhere between three and four o'clock that afternoon, several drivers passing by on I-80 remember seeing a young woman standing near her disabled car. And parked close by was a tractor-trailer with a faded orange stripe running down the side. The drive-by witnesses remember the tractor-trailer driver too.

That was the last confirmed sighting of Tammy Zywicki alive.

For a full list of source materials, please visit: www.preytellpodcast.com/episodes/murder-of-tammy-zywicki

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The town of Cloverdale, California sits at the northern end of Sonoma County’s wine country. Way back on May 23, 1982 it was warm, although the heat from peak daytime had worn off by the evening.

Sarah Geer left her friend’s house and set off walking downtown. She was a child and only thirteen-years-old at the time. She had no way of knowing she wouldn’t come home that night, and she would never make it to the eighth grade. Sarah was brutally raped and murdered by an unknown man in an alleyway. Her case went cold for over 40 years.

The charming, small town feel Cloverdale was known for fractured instantly.

For a full list of source materials, please visit: www.preytellpodcast.com/episodes/murder-of-sarah-geer

Connect with Prey Tell Podcast on social media and stay up-to-date on the latest case updates.

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For more information on the podcast or to suggest a case, visit: www.preytellpodcast.com