Overview

• Full name: Theresa Louise Rains
• Also known as: Theresa Samarpan
• Date of birth: April 13, 1949
• Age when last seen: 31 years old
• Date last seen: May 23, 1980
• Last known location: Oakland, Alameda County, California
• Classification: Missing person
• Current publicly documented status: Listed as missing by the California Department of Justice; an unverified historical claim of recovery creates uncertainty.
• Investigating agency: Oakland Police Department
• Police case number: 80-43773

Circumstances: Theresa was last seen in Oakland on May 23, 1980. Officially available information does not establish where she was going, whom she was meeting, or what happened afterward.

Detailed Case Breakdown

Theresa Louise Rains: The Unresolved 1980 Disappearance in Oakland, California

On May 23, 1980, 31-year-old Theresa Louise Rains was last seen in Oakland, California. More than four decades later, her disappearance remains documented in California’s official missing-person records, but the circumstances surrounding her last known movements remain largely unknown.

Theresa’s case is unusual not only because of the passage of time, but also because of conflicting information that has surfaced in online discussions. One community discussion includes a purported statement that she was located in 1999. However, the California Department of Justice continues to publish her missing-person record, and no official public confirmation resolving that discrepancy was located.

Her case raises an important question: What happened to Theresa Rains after May 23, 1980, and why does her name remain in the state’s missing-person database?

Case Summary

• Full name: Theresa Louise Rains
• Also known as: Theresa Samarpan
• Date of birth: April 13, 1949
• Age when last seen: 31 years old
• Date last seen: May 23, 1980
• Last known location: Oakland, Alameda County, California
• Classification: Missing person
• Current publicly documented status: Listed as missing by the California Department of Justice; an unverified historical claim of recovery creates uncertainty.
• Investigating agency: Oakland Police Department
• Police case number: 80-43773

Circumstances: Theresa was last seen in Oakland on May 23, 1980. Officially available information does not establish where she was going, whom she was meeting, or what happened afterward.

Source: California Department of Justice — Theresa Louise Rains.

Theresa Rains: Background and Personal Description

Theresa Louise Rains was born on April 13, 1949. She was 31 when she disappeared from Oakland in the spring of 1980.

Public records provide limited information about her childhood, education, employment, relationships, or daily life. Her official missing-person entry identifies her nickname as Theresa Samarpan, an alternate name that could be important when searching historical documents or identifying records.

The California Department of Justice records the following physical description:

• Height: 5 feet 6 inches
• Weight: Approximately 115 pounds
• Hair: Brown
• Eyes: Blue
• Race: White
• Distinguishing characteristic: Freckles

She was reportedly wearing blue jeans, a rust-colored coat, and lace-up boots when last seen.

These details remain important because clothing descriptions, physical characteristics, and alternate names can help investigators evaluate historical sightings and compare missing-person records against unidentified individuals.

The state’s record also indicates that dental X-rays were not available. That is a limitation in the publicly documented identification information, although it does not establish whether other forensic records have since been collected.

Source: California Department of Justice.

The Disappearance on May 23, 1980

The central confirmed fact in Theresa’s disappearance is straightforward: she was last seen in Oakland, California, on May 23, 1980.

What happened that day is far less clear.

The public missing-person record does not identify the exact address of her last sighting, the person who last saw her, or the circumstances under which she disappeared.

There is also no verified public account establishing whether she left home voluntarily, was traveling, experienced an emergency, or encountered another person before losing contact with those who knew her.

No publicly documented vehicle description, travel itinerary, or destination could be established from the official case information reviewed.

These gaps make it difficult to reconstruct Theresa’s final known hours without access to the original investigative file.

Her disappearance occurred before modern digital communication, widespread surveillance systems, and today’s centralized missing-person resources. That historical context helps explain why older cases can contain substantial gaps in publicly accessible information, although it does not establish what investigative work occurred in Theresa’s case.

Investigation History and Available Evidence

Oakland Police Department Investigation

The Oakland Police Department is identified as the reporting agency in Theresa’s California Department of Justice missing-person record.

The state lists police case number 80-43773, providing a specific reference for inquiries concerning her disappearance.

However, the available official profile does not describe the original investigative response. No verified public details were located concerning neighborhood searches, witness interviews, searches of residences, or the collection of physical evidence.

This absence of published information should not be interpreted as proof that investigators failed to conduct those activities. It means their scope and results could not be independently established from the public sources reviewed.

National Missing-Person Records

Theresa’s disappearance has also appeared in national missing-person resources and community discussions.

A Websleuths discussion created on October 2, 2019, reproduces historical information attributed to NamUs, identifying her as missing from Oakland and associating her with NamUs MP50221.

The discussion records May 22, 2018, as the creation date of her NamUs case. This is a database-record date, not evidence of a new investigative discovery.

Because the current NamUs profile was not independently retrieved, MP50221 should be treated as a historically reported database reference rather than confirmation of a currently active NamUs entry.

Source: Websleuths — Theresa Rains Discussion.

Doe Network Documentation

The Doe Network has historically documented Theresa under reference 747DFCA.

Its published update archive records the addition of her case on January 19, 2020. That entry concerns the publication of a missing-person profile, not a newly discovered clue or forensic breakthrough.

Source: Doe Network — 2020 Updates.

Physical and Forensic Evidence

No reliable public investigative report was located confirming that authorities recovered Theresa’s belongings, collected biological evidence, obtained fingerprints for comparison, or conducted DNA-based identification work.

Likewise, no verified case-specific announcement was found describing forensic genetic genealogy, a confirmed unidentified-remains match, or an officially identified suspect.

The lack of a publicly available announcement does not mean these investigative avenues have never been considered.

Theories, Community Discussion, and Unresolved Questions

Was Theresa Located in 1999?

One of the most significant unresolved issues comes from a Websleuths discussion about Theresa’s case.

In a February 4, 2021, post, a participant reproduced a purported message attributed to Jessica Esber, identified there as a DNA project manager with the Clark County Office of the Coroner/Medical Examiner.

The quoted message stated that, after contacting Oakland police, she had learned Theresa was located in 1999.

This is a secondary-source claim, not an independently verified official finding.

The discussion did not provide an authenticated police report, a formal recovery announcement, or documentation establishing whether the reported location referred to Theresa being found alive or deceased.

Furthermore, Theresa continued to appear in California’s official missing-person database in records available during this research.

These conflicting accounts should not be resolved by assumption. Only confirmation from the responsible agency or another authoritative record could establish whether the 1999 claim is accurate and what it means for her case status.

Source: Websleuths — Theresa Rains Discussion.

Speculation About Personal Relationships

Other participants in the same discussion explored possible historical relationships and religious associations connected with names resembling Theresa’s alternate name.

These discussions contain personal interpretations and unverified connections. No official investigative source reviewed establishes that a spouse, religious organization, or acquaintance was involved in her disappearance.

Such speculation should not be treated as evidence of criminal conduct.

Comparisons With Unidentified Remains

Theresa’s name has also appeared in discussions comparing missing women with unidentified human remains, including historical speculation involving the unidentified woman once known as the Buckskin Girl.

Those discussions demonstrate public interest in possible identifications, but they do not establish a confirmed forensic connection.

A resemblance or similarity in age, clothing, or physical appearance is not sufficient to identify a missing person.

There is no verified public evidence establishing that Theresa was the unidentified woman discussed in those comparisons.

Source: Websleuths — Buckskin Girl Discussion.

Questions That Remain Unanswered

Several essential questions remain unresolved in the publicly accessible record:

• Where in Oakland was Theresa last seen?
• Who last had confirmed contact with her?
• What circumstances led authorities to classify her as missing?
• Were any credible sightings reported after May 23, 1980?
• What is the original source of the claim that she was located in 1999?
• Has Oakland police conducted a formal case-status review or closed the investigation?

These are unanswered questions, not evidence supporting any particular theory.

Latest Publicly Available Investigative Updates

As of October 25, 2026, the most authoritative publicly accessible source located during this research remains the California Department of Justice missing-person listing.

That listing continues to identify Theresa Louise Rains as missing and provides the Oakland Police Department’s case reference and contact number.

The available historical record also documents the following public-awareness activity.

In May 2018, a NamUs record was reportedly created, according to information preserved in a 2019 community discussion.

On October 2, 2019, a Websleuths discussion dedicated to Theresa’s disappearance began.

On January 19, 2020, the Doe Network’s archive records her case being added to its database.

On May 23, 2020, the community blog Count Every Mystery published a brief article revisiting her disappearance and physical description.

In February 2021, the Websleuths discussion raised the unresolved claim that Theresa had been located in 1999. Subsequent posts continued to question the apparent inconsistency between that claim and the official missing-person listing.

These are documentation and public-discussion milestones. They are not confirmed investigative breakthroughs.

No publicly confirmed recent developments were located establishing an arrest, criminal charge, identified remains, DNA match, or definitive resolution of Theresa’s disappearance.

Sources: California DOJ, Doe Network Archive, Count Every Mystery, and Websleuths.

Conclusion: Seeking Answers About Theresa Louise Rains

Theresa Louise Rains was 31 years old when she was last seen in Oakland on May 23, 1980. Her official missing-person record preserves a physical description, her alternate name, and the police agency responsible for the case.

Yet the circumstances of her disappearance remain unclear to the public.

The historical claim that she was located in 1999 makes verification of her current case status particularly important. Until an authoritative source clarifies that information, it would be inappropriate either to declare her case solved or to characterize her disappearance as a confirmed homicide.

Anyone with firsthand knowledge of Theresa’s whereabouts, her activities around May 23, 1980, or records that could clarify the reported 1999 development is encouraged to contact the Oakland Police Department.

Information can also be submitted through the California Department of Justice’s missing-person hotline.

Even decades later, reliable firsthand information or previously unavailable records may help clarify what happened to Theresa and whether her official case status requires updating.