Overview

Last seen: August 17, 1971
Location: Vicinity of Bailey Avenue and Santa Teresa Avenue, San Jose, California
Age: 33
Status: Missing; no publicly documented resolution
Investigating agency: Santa Clara County Sheriff’s Office
NamUs: MP27901
Doe Network: 3541DFCA

Beatrice Susan Calderon disappeared from the San Jose, California area on August 17, 1971. More than five decades later, publicly available records still provide remarkably little information about what happened before or after she was last seen.

Detailed Case Breakdown

Beatrice Susan Calderon Missing Person Case: San Jose, California, 1971

Brief Last Seen Summary

Last seen: August 17, 1971
Location: Vicinity of Bailey Avenue and Santa Teresa Avenue, San Jose, California
Age: 33
Status: Missing; no publicly documented resolution
Investigating agency: Santa Clara County Sheriff’s Office
NamUs: MP27901
Doe Network: 3541DFCA

Beatrice Susan Calderon disappeared from the San Jose, California area on August 17, 1971. More than five decades later, publicly available records still provide remarkably little information about what happened before or after she was last seen.

The Disappearance of Beatrice Susan Calderon

Beatrice Susan Calderon was 33 years old when she was last seen in the vicinity of Bailey Avenue and Santa Teresa Avenue in San Jose, California, on August 17, 1971. According to The Charley Project, she was never heard from again, and few details concerning the circumstances of her disappearance have been publicly released.

No publicly available account reviewed for this article describes who last saw Beatrice, what she was doing immediately before she disappeared, whether she was traveling on foot or in a vehicle, or whether any personal belongings were recovered afterward.

There is likewise no reliable public documentation establishing that Beatrice was the victim of a homicide. Her case continues to be listed as a missing-person case.

Who Was Beatrice Calderon?

Beatrice was described as a Hispanic woman approximately 5 feet tall and 160 pounds, with black hair and brown eyes. She had two small moles on her right cheek and a distinctive surgical scar approximately 12 inches long on her abdomen. Sources also state that she may have used the surname Segura.

One notable inconsistency exists in publicly available records concerning her birth date. The Charley Project lists her date of birth as June 5, 1938. A 2026 Websleuths post quoting the Doe Network profile identifies her as Beatrice Susan Segura and gives a birth date of July 5, 1938. The discrepancy should be treated as unresolved unless the investigating agency or an authoritative primary record confirms the correct date.

Her age at disappearance—33—is consistent across the principal missing-person sources.

What Is Known About the Circumstances?

The confirmed public narrative is extremely limited. Beatrice was last seen around Bailey Avenue and Santa Teresa Avenue on August 17, 1971. After that encounter or sighting, there is no publicly documented confirmed contact with her.

Available case summaries do not identify a suspect, person of interest, known confrontation, planned trip, destination, abandoned vehicle, recovered clothing, eyewitness account describing her departure, or other publicly disclosed evidence explaining how she disappeared.

The lack of information is significant because it prevents many common theories from being evaluated against publicly known evidence. Claims that Beatrice was murdered, abducted, voluntarily disappeared, left California, or encountered a particular offender remain speculative unless supported by investigative records that have not been made public.

Unidentified-Person Comparisons

Over the decades, researchers have considered whether unidentified remains discovered elsewhere could belong to Beatrice.

One documented comparison involves the unidentified woman commonly called San Fernando Jane Doe, whose body was discovered in Los Angeles County in 1976. Current missing- and unidentified-person reference material lists Beatrice Calderon among the women excluded as that unidentified person.

A Websleuths discussion also raised Beatrice as a possible match for unidentified skeletal remains found near Fillmore, California, in January 1973. Importantly, that suggestion originated in public case discussion and should not be interpreted as confirmation that law enforcement considered the remains a viable match or that the comparison produced an investigative finding.

Case Records and Renewed Attention

Beatrice’s case was added to the Doe Network under reference 3541DFCA in April 2016. The organization’s archived website update confirms that the entry represents Beatrice Susan Calderon, missing from California since 1971.

Her case is also associated with NamUs MP27901 in multiple missing-person databases and archived discussions.

Public discussion of Beatrice’s disappearance has continued despite the scarcity of information. A Websleuths thread created in 2018 was revived on January 25, 2026, with a contributor noting that August 2026 would mark 55 years since Beatrice disappeared. Another 2026 contribution directed readers to her Doe Network record. These posts represent renewed public attention rather than a reported investigative breakthrough.

Latest Publicly Available Investigation Information

As of September 2026, no credible publicly available law-enforcement announcement located during research for this article reports that Beatrice has been found, identifies a suspect, announces an arrest, or states that investigators have determined what happened to her.

The Santa Clara County Sheriff’s Office remains identified by The Charley Project as the investigating agency, with 408-808-4500 listed as the case contact number.

The Sheriff’s Office also currently publishes 408-808-4431 as its Investigative Services anonymous tip line in missing-person and investigative releases. That number is a general investigative tip line rather than a Beatrice-specific hotline.

The most recent public developments found are therefore continued database listings, unidentified-person comparison information, and renewed public discussion—not a newly announced law-enforcement resolution.

Why the Beatrice Calderon Case Remains Difficult

Beatrice disappeared in 1971, decades before modern missing-person databases, widespread surveillance cameras, cell-phone location records, consumer DNA testing and many other investigative resources available today.

The publicly available record contains no detailed reconstruction of her final day. Without information about her companions, transportation, residence, employment, relationships, plans or circumstances immediately preceding her disappearance, members of the public have very little reliable evidence from which to work.

That makes accurate preservation of Beatrice’s identifying information especially important. Her black hair, brown eyes, two moles on her right cheek, abdominal surgical scar and possible use of the surname Segura may all be significant when comparing historic records or unidentified-person cases.

Beatrice Calderon Is Still Missing

Beatrice Susan Calderon was only 33 when she disappeared from San Jose on August 17, 1971. Her case has now remained unresolved for more than half a century.

Although online researchers continue to discuss her disappearance and compare her information with unidentified-person cases, there is currently no publicly confirmed explanation for what happened after she was last seen near Bailey Avenue and Santa Teresa Avenue.

Anyone who possesses first-hand information concerning Beatrice’s disappearance—including information that may have seemed insignificant decades ago—should provide it directly to the Santa Clara County Sheriff’s Office rather than relying solely on online discussion.