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Case Description
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In the spring of 1968, 18-year-old Sydney Monzon was last seen alive in Provincetown, Massachusetts, getting into a car with a man named Antone "Tony" Costa. Her disappearance in May of that year initially garnered little media attention, as she was one of several local teenagers who had vanished, and authorities believed she might have left on her own accord. Monzon, who was described as a petite woman, about four feet, eleven inches tall, was living with a local fisherman at the time but was a ...Read More
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See any mistakes?Victim Details
Sydney Monzon
Female
White / Caucasian
Provincetown
MA
1968-05
18
Sydney
Monzon
11/08/2025



