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Police Bureau

Sworn to protect. Dedicated to serve.

Phone: 503-823-0000

Fax: 503-823-0342

Non-Emergency: 503-823-3333

1111 S.W. 2nd Avenue, Portland, OR 97204

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Case #91-57365

Li Yang Yuan, a 29-year-old woman from China, was here on a visitor’s visa with her husband living in Portland. On the evening of July 3, 1991, her husband came home to their studio apartment at the Jefferson Plaza at 1515 SW Jefferson Street to find her deceased. An autopsy concluded that Li Yang had died as the result of strangulation.

It was reported that Ms. Yuan had been romantically involved with others outside of her marriage. Li Yang was last seen leaving the apartment building that morning.

Li Yang was employed at The Mandarin Cove Chinese restaurant on SW Columbia Street as well as a Chinese herb shop on 82nd Avenue. In China, Li Yang taught English classes at a university in China.

Witnesses may contact Cold Case Homicide Unit investigators directly at (503) 823-0400. To remain anonymous, witnesses may provide information through Crime Stoppers of Oregon.

Crime Stoppers of Oregon offers cash rewards for information, reported to Crime Stoppers, that leads to an arrest in any unsolved felony crime and tipsters can remain anonymous.

Information about unsolved homicides can lead to a reward of up to $2,500 cash. All other unsolved felony crimes are eligible for cash rewards of up to $1,000.

Information learned from social media sites such as Facebook, Twitter or YouTube should be shared as these tips may lead to the identification of a suspect or suspects. Links can be shared anonymously through Crime Stoppers.

Submit an anonymous tip:

Text CRIMES (274637) - Type 823HELP, followed by the tip.

Online at

Call 503-823-HELP (4357)

Visit to download the TipSubmit app for the iPhone or Droid.