Overview

Last known contact: January 1, 1975
Location: Dallas, Texas
Age: 19
Status: Missing; later legally declared deceased
Tribal affiliation: Kiowa Tribe
NamUs: MP80933
Doe Network: 4369DFTX

Sonja Kay Redbird was a 19-year-old Kiowa woman originally from Anadarko, Oklahoma, who was living in Dallas, Texas when contact with her family abruptly stopped in 1975. Available case records contain very little information about what happened immediately before she disappeared, and no confirmed account explaining where she went has publicly emerged.

Detailed Case Breakdown

Sonja Kay Redbird: 19-Year-Old Kiowa Woman Missing From Dallas Since 1975

Brief Case Summary

Last known contact: January 1, 1975
Location: Dallas, Texas
Age: 19
Status: Missing; later legally declared deceased
Tribal affiliation: Kiowa Tribe
NamUs: MP80933
Doe Network: 4369DFTX

Sonja Kay Redbird was a 19-year-old Kiowa woman originally from Anadarko, Oklahoma, who was living in Dallas, Texas when contact with her family abruptly stopped in 1975. Available case records contain very little information about what happened immediately before she disappeared, and no confirmed account explaining where she went has publicly emerged.

Sonja Kay Redbird Disappears From Dallas, Texas

Sonja Kay Redbird, whose first name has also been recorded as Sonya and Sonia, disappeared in 1975 while living in Dallas, Texas. Missing-person databases generally use January 1, 1975 as her date of last contact, although that date appears to function as the recorded case date rather than a documented sighting on New Year’s Day.

Sonja was 19 years old. She stood approximately 5 feet to 5 feet 4 inches tall and weighed an estimated 130 to 140 pounds. She had brown hair and brown eyes and was an enrolled member of the Kiowa Tribe.

From Anadarko to Dallas

Sonja was originally from Anadarko, Oklahoma, a community closely connected to the Kiowa Tribe. Oklahoma Cold Cases reports that she relocated to Dallas in approximately 1972.

Despite living away from home, Sonja reportedly remained in regular contact with her relatives. That communication continued until around January 1975. Then, without a publicly known explanation, the contact stopped.

Her relatives never heard from her again.

There is no publicly documented final telephone call, confirmed eyewitness account, vehicle description, residence address or detailed description of the clothing Sonja was wearing when she disappeared. The lack of information surrounding her final known days has left investigators and researchers with few publicly available leads.

What Happened to Sonja Redbird?

The circumstances surrounding Sonja’s disappearance remain unclear.

There is no publicly confirmed evidence establishing that she left Dallas voluntarily, suffered an accident or became the victim of a crime. No publicly identified suspect has been named in connection with her disappearance.

At some point after she vanished, Sonja was declared legally deceased through tribal court proceedings. A legal declaration of death, however, does not establish how or where a person died and does not by itself mean that human remains have been recovered.

Her remains have not been publicly reported as recovered or identified.

A Case That Received Wider Recognition Decades Later

For many years, Sonja’s disappearance had relatively little public exposure.

Her case eventually became part of national missing-person resources. NamUs included Sonja among unresolved missing-person cases involving Native American and tribal communities, recording Texas as the state of disappearance and January 1, 1975 as her last-contact date.

The Doe Network added her as case 4369DFTX in July 2022.

The Charley Project also added a case file for Sonja on July 12, 2022. Its listing identifies the Kiowa Tribe of Oklahoma, the U.S. Attorney’s Office for the Western District of Oklahoma and the Bureau of Indian Affairs as agencies associated with the investigation.

Possible Jane Doe Comparisons

Sonja’s disappearance has attracted attention from online missing-person and unidentified-remains researchers.

Members of Websleuths have discussed whether she could be connected with unidentified women found in other states. One discussion considered a possible comparison with an unidentified Native American or mixed-race woman whose remains were found in Oregon in 1976. Another discussion examined the unidentified young woman sometimes called “Cheryl” or “Sherry,” whose body was recovered from the Harpeth River near Nashville, Tennessee in March 1976.

A Reddit discussion beginning in April 2024 also examined similarities between Sonja and the Tennessee unidentified woman. Participants pointed to similarities in general physical characteristics while also noting discrepancies involving age and facial appearance. Discussion continued into July 2025.

These comparisons are public theories, not confirmed investigative findings. No reliable public source located for this article states that Sonja has officially been identified as any of those Jane Does or that law enforcement has confirmed a forensic match.

Latest Publicly Available Case Information

A review of publicly accessible records through September 2026 did not locate an official announcement that Sonja has been found, identified or that her disappearance has been solved.

The most substantial publicly documented case-development period appears to have occurred in 2021–2022, when her case appeared in federal NamUs tribal missing-person reporting and was subsequently added to the Doe Network and The Charley Project. Her Charley Project file continues to classify her as missing and lists multiple agencies for information concerning the case.

Oklahoma Cold Cases also continues to publish Sonja’s case as unresolved and identifies NamUs MP80933 as her missing-person record.

More recent online activity has largely consisted of public efforts to compare Sonja with unidentified remains rather than an announced breakthrough by investigators. Those discussions may generate tips worth submitting to authorities, but they should not be treated as confirmation that investigators have established a connection.

Why Sonja Redbird’s Case Still Matters

Sonja was only 19 when communication with her family ended.

More than half a century later, the fundamental questions remain unanswered: where did she go, what happened after her family last heard from her, and where is she now?

Her case also represents the challenges investigators face when trying to reconstruct disappearances that occurred decades before modern missing-person databases, digital records and widespread DNA comparison programs existed.

The continued inclusion of Sonja’s case in national and community missing-person resources keeps her name, photograph and identifying information available to investigators, researchers and members of the public who may recognize something that was previously overlooked.

Anyone with information concerning Sonja Kay Redbird’s disappearance should contact one of the investigating agencies associated with her case.