Overview

• Full name: Cynthia Wingyan Yeung
• Age when missing: 22 years old
• Date of birth: September 12, 1985
• Last seen: March 14, 2008
• Last known city: El Cerrito
• County: Contra Costa County
• State: California
• Case classification: Missing person; classified as endangered missing by The Charley Project
• Investigating agency: El Cerrito Police Department
• Police case number: 08-5012
• Publicly documented status: Missing; no confirmed recovery or resolution located

Cynthia’s case is documented by the California Department of Justice and The Charley Project. Both identify March 14, 2008, as the date she was last seen. The absence of a detailed public account of her final movements has left fundamental questions about her disappearance unanswered.

Detailed Case Breakdown

Case Summary

Cynthia Wingyan Yeung was 22 years old when she disappeared from El Cerrito, California, on March 14, 2008. Her disappearance remains a troubling missing-person case with few publicly documented circumstances. Although a missing-person organization describes her disappearance as suspicious, there is no publicly verified finding that she was the victim of a homicide.

• Full name: Cynthia Wingyan Yeung
• Age when missing: 22 years old
• Date of birth: September 12, 1985
• Last seen: March 14, 2008
• Last known city: El Cerrito
• County: Contra Costa County
• State: California
• Case classification: Missing person; classified as endangered missing by The Charley Project
• Investigating agency: El Cerrito Police Department
• Police case number: 08-5012
• Publicly documented status: Missing; no confirmed recovery or resolution located

Cynthia’s case is documented by the California Department of Justice and The Charley Project. Both identify March 14, 2008, as the date she was last seen. The absence of a detailed public account of her final movements has left fundamental questions about her disappearance unanswered.

Background and Circumstances of Cynthia Yeung’s Disappearance

Cynthia Wingyan Yeung was born on September 12, 1985, and was of Chinese descent. At the time of her disappearance, she was a young adult living at a stage of life when many people are establishing careers, relationships, and plans for the future. Publicly accessible case records, however, provide little information about her education, employment, household, family relationships, or personal interests.

Official identifying information describes Cynthia as approximately 5 feet 3 inches tall and weighing 120 pounds. She had brown eyes and dark hair. The California Department of Justice lists her hair color as brown, while other missing-person listings describe it as black. These differences should be considered when reviewing photographs or possible sightings.

On March 14, 2008, Cynthia was last seen in El Cerrito, a city in Contra Costa County in the San Francisco Bay Area. That date is the central confirmed event in the publicly available account of her disappearance.

Available case summaries do not establish the exact address where Cynthia was last seen, the time of her final confirmed sighting, whom she was with, or what she was doing immediately before she vanished. They also do not provide a verified description of the clothing she was wearing that day.

After March 14, 2008, Cynthia was not heard from again, according to The Charley Project. The organization describes her disappearance as occurring under suspicious circumstances but does not publish specific evidence explaining that assessment.

These gaps are important. Without verified information about her final movements, it would be inappropriate to suggest that Cynthia entered a particular vehicle, traveled to a specific destination, met an unidentified person, or experienced a particular form of harm. None of those scenarios is established by the available public record.

Investigation History and Available Evidence

The El Cerrito Police Department is identified by the California Department of Justice as the agency responsible for Cynthia’s missing-person case. Her official state listing includes police case number 08-5012, providing a specific reference for anyone contacting investigators with potentially relevant information.

Cynthia’s disappearance was also documented by The Charley Project, which identifies her as an endangered missing person. Its published case summary records her last known location, identifying characteristics, and the suspicious nature of the disappearance, but contains few additional investigative details.

The California Department of Justice records that dental X-rays are available for Cynthia. Dental records can be valuable in missing-person identification efforts, particularly when investigators need to compare a missing person’s known dental characteristics with unidentified remains. The existence of those records does not, however, establish that a forensic comparison has occurred or produced a result in Cynthia’s case.

Publicly available information does not describe a documented search operation, a recovered personal possession, a confirmed surveillance recording, or physical evidence establishing what happened to Cynthia. No verified public account of witness interviews or a specific investigative reconstruction of her final hours was located.

Likewise, no publicly confirmed announcement was located identifying a suspect or person of interest, reporting an arrest, or describing criminal charges directly connected to Cynthia’s disappearance. The absence of publicly released information should not be interpreted as proof that investigators have never pursued leads or conducted investigative work.

Cynthia’s disappearance has also appeared in missing-person databases and community discussions, helping preserve public awareness of her case. Such listings can assist in circulating identifying details, but they should not be mistaken for independent confirmation of new evidence or investigative progress.

Theories and Unresolved Questions

The most significant unanswered question is what happened to Cynthia after she was last seen on March 14, 2008. Public records do not establish whether she left El Cerrito voluntarily, encountered an emergency, experienced an accident, or became the victim of a crime.

The Charley Project’s classification of her disappearance as suspicious raises concern, but it does not establish a particular explanation. No verified public evidence supports identifying an abduction, homicide, voluntary disappearance, or accidental death as the confirmed outcome.

Where Was Cynthia Last Seen?

Although El Cerrito is consistently identified as her last known city, the precise location of her final confirmed sighting has not been established in the reviewed public records. Knowing that location could help clarify her possible movements, but it would be speculative to assign her disappearance to a particular street, building, transit station, or neighborhood.

Were There Witnesses or Additional Leads?

The available case summaries do not identify witnesses who saw Cynthia shortly before she disappeared. They also do not disclose whether investigators received credible later sightings or developed specific leads. This lack of published information does not establish that no such reports were ever received.

Could Unidentified-Person Records Be Relevant?

Comparisons between missing-person records and unidentified-person cases are a recognized investigative method. However, no verified public announcement was located establishing that Cynthia has been identified through such a comparison. No particular unidentified-person case should be presented as a match without confirmation from the responsible authorities.

For Cynthia’s case, the distinction between questions and established facts is especially important. The limited public record does not justify assigning blame to any person or presenting an unsupported explanation for her disappearance.

Latest Publicly Available Investigative Updates

As of October 31, 2026, Cynthia Wingyan Yeung remains listed in the California Department of Justice’s public missing-person information. The state record continues to identify March 14, 2008, as her last-seen date and the El Cerrito Police Department as the reporting agency.

The Charley Project also continues to publish Cynthia’s case as an endangered missing-person disappearance. Its case history identifies September 14, 2008, as the date the casefile was added. That historical listing is not evidence of a new investigative development.

A publicly accessible community discussion concerning Cynthia began in June 2023, and later discussion has continued to reference existing case records. Community attention may help keep a missing person’s name visible, but the creation or updating of an online discussion does not establish that police have uncovered new evidence.

No publicly confirmed recent investigative breakthrough was located in the reviewed sources. Specifically, no verified recent announcement was found reporting Cynthia’s recovery, the identification of remains as hers, an arrest, criminal charges, a new forensic identification, or a resolution of the disappearance.

There was also no verified case-specific announcement establishing that forensic genetic genealogy, new DNA testing, or a recently reopened cold-case investigation had produced a development in Cynthia’s disappearance. These techniques may be used in missing-person investigations generally, but their application to this case should not be assumed.

The continued availability of Cynthia’s official missing-person record means that members of the public can still consult her identifying information and contact the listed authorities. Any future change in her status should be confirmed through an official law enforcement announcement or another reliable primary source.

Conclusion and Public Appeal for Information

More than eighteen years have passed since Cynthia Wingyan Yeung disappeared from El Cerrito, California, on March 14, 2008. She was only 22 years old, and the publicly documented circumstances surrounding her disappearance remain exceptionally limited.

Her case illustrates the importance of preserving accurate missing-person information even when few investigative details have been released. Cynthia’s name, photograph, identifying characteristics, last-seen date, and official police case number remain essential points of reference for anyone who may possess relevant information.

Anyone who remembers seeing Cynthia in El Cerrito around March 14, 2008, or who possesses credible information about her whereabouts after that date, is encouraged to contact the El Cerrito Police Department at (510) 215-4402. Callers should reference case number 08-5012.

Information may also be provided through the California Department of Justice’s missing-person hotline at 1-800-222-FIND (1-800-222-3463). Even an observation that seemed unimportant at the time may be worth reporting if it can be described accurately and connected to Cynthia’s disappearance.

Cynthia Wingyan Yeung deserves to be remembered as a person, not simply an unresolved case. Until reliable information establishes what happened to her, the responsible approach is to keep her disappearance visible, respect the uncertainty surrounding the evidence, and direct potentially useful information to investigators.