Overview

Last known contact: December 15, 1965
Location: Stockton, San Joaquin County, California
Age: 56
Date of birth: April 11, 1909
Classification: Missing person
NamUs #: MP77659
Doe Network #: 7074DMCA

Main circumstances: Trapp was not in frequent contact with relatives, but he had an established habit of sending them a Christmas card each year. The last known card was dated December 15, 1965. The annual cards subsequently stopped, and after the family went through another Christmas without hearing from him, they realized something was wrong. He has never been located.

Detailed Case Breakdown

Robert William Trapp: The 1965 Stockton, California Missing Person Case

Robert William Trapp was 56 years old when his known contact with family abruptly ended in December 1965. More than six decades later, Trapp remains listed as a missing person in California, and the circumstances surrounding his disappearance remain largely unknown.

Brief Case Summary

Last known contact: December 15, 1965
Location: Stockton, San Joaquin County, California
Age: 56
Date of birth: April 11, 1909
Classification: Missing person
NamUs #: MP77659
Doe Network #: 7074DMCA

Main circumstances: Trapp was not in frequent contact with relatives, but he had an established habit of sending them a Christmas card each year. The last known card was dated December 15, 1965. The annual cards subsequently stopped, and after the family went through another Christmas without hearing from him, they realized something was wrong. He has never been located.

The Disappearance of Robert William Trapp

Robert William Trapp was born on April 11, 1909. At the time he disappeared, he was described as a white man with red or auburn hair and blue eyes. Sources place his height between approximately 5 feet 10 inches and 5 feet 11 inches and his weight between 160 and 180 pounds. A scar on his forehead has also been reported as a distinguishing characteristic.

There is an unusual difficulty at the center of Trapp’s case: investigators do not have a conventional account of someone seeing him leave a home, workplace, restaurant, or other specific location. Instead, his disappearance was recognized through the sudden end of a longstanding family tradition.

A Christmas Card Became the Last Known Contact

Although Trapp reportedly did not communicate with his family frequently, relatives could expect one reliable sign from him each year: a Christmas card. According to published case summaries, the cards had arrived consistently. The final known card was dated December 15, 1965.

Then the cards stopped.

When Christmas 1966 passed without the customary communication, there was reason for concern. By the time another year passed without a card, his relatives realized that his silence was more than an interruption in correspondence. Trapp had apparently vanished.

No confirmed subsequent communication from Robert William Trapp has been publicly documented.

Why the Case Is Especially Difficult

Trapp’s case dates to an era before computerized missing-person databases, widespread surveillance cameras, mobile phones, electronic financial records, DNA databases, and many of the investigative tools routinely available today.

Compounding those difficulties is the delay between Trapp’s final known communication and the family’s realization that something was seriously wrong. Because he was accustomed to having limited contact with relatives, his silence did not immediately establish that he was missing.

Publicly available case summaries provide very little information about his activities immediately before December 15, 1965. They do not establish precisely where he was living, where he went after his last contact, what transportation he was using, or who last saw him in person.

The California Department of Justice continues to list Trapp as a missing person and identifies the Stockton Police Department as the reporting agency.

Was Robert Trapp the Victim of a Crime?

There is no publicly established evidence proving that Robert Trapp was murdered.

One theory discussed outside official law-enforcement sources involves serial killer Juan Corona, who murdered migrant and itinerant laborers in Northern California. A Websleuths discussion cites comments attributed to a niece of Trapp saying relatives had wondered whether Trapp might have been one of Corona’s victims because they believed he fit the general profile of an itinerant laborer. According to that discussion, the family did not report the theory to police at the time.

That possibility should be treated strictly as an unconfirmed family/community theory, not an established connection. No publicly located law-enforcement source identifies Trapp as a confirmed or suspected Corona victim.

Questions That Remain Unanswered

The passage of more than 60 years has left fundamental questions unresolved. It is unclear exactly where Trapp was when he sent or wrote his final Christmas card, who last saw him, whether he owned or was traveling in a vehicle, or whether anything unusual was happening in his life at the time.

It is likewise unknown whether he died accidentally or naturally without being identified, deliberately disappeared, encountered someone who harmed him, or became an unidentified decedent whose remains have never been connected to his missing-person case.

Even his family’s annual Christmas-card tradition raises an important investigative question: was December 15, 1965 actually the date something happened to Trapp, or simply the date of the last surviving evidence showing that he was alive?

Latest Publicly Available Case Activity

Robert William Trapp’s case remains publicly listed by the California Department of Justice as a missing-person case, with the Stockton Police Department identified as the reporting agency. The state listing gives a last-contact date of December 15, 1965.

A significant recent development in the case’s public documentation occurred in 2026, when the Doe Network added Robert William Trapp as case 7074DMCA. The organization’s 2026 site-update record specifically identifies him as missing from California since 1965.

A Websleuths case discussion was also updated on April 3, 2026, directing readers to the new Doe Network listing and the Stockton Police Department’s missing-person material.

These developments increase the case’s visibility, but no credible publicly available source located for this article reports that Trapp has been found, identified among unidentified remains, or that an arrest or confirmed suspect has emerged.

There is also an important discrepancy in publicly available identifiers. Stockton-related material and Websleuths reference 21-36992, while the current California Department of Justice record displays 2136992. Both are included below so that anyone contacting investigators can provide all available reference information.

Robert William Trapp’s Description

At the time of his disappearance, Trapp was 56 years old, with red or auburn hair and blue eyes. California’s current missing-person record lists him at 5 feet 10 inches and 160 pounds, while other case sources give a range of 5 feet 10 to 5 feet 11 inches and 160 to 180 pounds. A forehead scar is described in secondary case records.

The photographs circulated in connection with his case date from the 1940s rather than the time of his disappearance, according to the Websleuths discussion reproducing case material. That makes visual identification particularly challenging.

More Than Six Decades Without an Answer

Robert William Trapp’s disappearance demonstrates how an ordinary family routine can become the final marker in an unresolved missing-person case.

There was no dramatic publicly documented final sighting. Instead, there was a Christmas card—and then silence.

Today, Trapp’s name remains in missing-person resources, and the addition of his case to the Doe Network in 2026 has brought renewed online documentation to a disappearance dating back to 1965. Anyone possessing information that could establish where Trapp went, whom he associated with, or what happened after his final contact should provide that information to law enforcement.