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Someone Made Maria Hsiao's 21st Birthday Her Last

On June 10th, 2001, college student Maria Hsiao was heading out to celebrate her 21st birthday, and had invited all her close friends and her sister. At the time, no one knew that would be the last birthday Maria would get to celebrate.

If you have any information that can help crack this cold case, please contact the Palo Alto Police Department at (650) 329-2406. Anonymous tips can be e-mailed to or sent via text message or voice mail to (650) 383-8984.