Maria Hsiao died in a shooting June 10, 2001 outside a downtown nightclub.
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Police are asking people to watch this video:
Police are also asking people to share the video on their social networks. The more people who see it, the better chance someone will provide a tip that will lead officers to the killer, police said.
Even someone with second- or third-hand information may be helpful.
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Anonymous tips may be emailed to paloaltotipnow.org or sent by text message or voicemail to (650) 383-8984.
Tips may also be sent to the department's free mobile app, which can be downloaded from bit.ly/PAPD-AppStore or bit.ly/PAPD-GooglePlay.
People can also call in tips to the detective bureau at (650) 329-2597.