Overview

• Full name: James L. Lampman
• Age at disappearance: 43
• Date last seen: April 20, 1978
• Last known location: San Francisco, California
• City and county: San Francisco, San Francisco County
• State: California
• Date of birth: March 16, 1935
• Physical description: White male, brown hair, blue eyes, approximately 5 feet 8 inches tall and 140 pounds
• Case classification: Missing person; homicide not established
• Current case status: Unresolved in publicly accessible missing-person listings
• Investigating agency: San Francisco Police Department
• Main circumstances: Lampman was reported missing in connection with an April 20, 1978, last-seen date. Publicly available records do not establish where he was last observed, whom he was with, or what caused his disappearance.

Detailed Case Breakdown

James L. Lampman: The Unsolved 1978 Disappearance in San Francisco, California

On April 20, 1978, 43-year-old James L. Lampman disappeared in San Francisco, California. More than 48 years later, his whereabouts remain unknown in the publicly available missing-person records reviewed for this article.

Lampman’s disappearance is documented by the California Department of Justice and referenced in the National Missing and Unidentified Persons System (NamUs). Yet the publicly accessible information provides few details about what happened to him, the circumstances of his final known movements, or the investigation that followed.

His case remains an unresolved disappearance, not a confirmed homicide. The absence of a publicly documented explanation leaves important questions unanswered about what happened in April 1978 and whether information still exists that could help establish his fate.

Case Summary

• Full name: James L. Lampman
• Age at disappearance: 43
• Date last seen: April 20, 1978
• Last known location: San Francisco, California
• City and county: San Francisco, San Francisco County
• State: California
• Date of birth: March 16, 1935
• Physical description: White male, brown hair, blue eyes, approximately 5 feet 8 inches tall and 140 pounds
• Case classification: Missing person; homicide not established
• Current case status: Unresolved in publicly accessible missing-person listings
• Investigating agency: San Francisco Police Department
• Main circumstances: Lampman was reported missing in connection with an April 20, 1978, last-seen date. Publicly available records do not establish where he was last observed, whom he was with, or what caused his disappearance.

Sources: California Department of Justice Missing Person Search and CaseTrace’s NamUs-linked listing.

James Lampman’s Background and Life Before His Disappearance

James L. Lampman was born on March 16, 1935, according to the California Department of Justice’s missing-person database. He was 43 years old when he disappeared in 1978.

The state database describes Lampman as a white male with brown hair and blue eyes, standing approximately 5 feet 8 inches tall and weighing 140 pounds. These identifying characteristics may be useful when comparing historical missing-person records, photographs, or unidentified-person reports.

Beyond those basic details, reliable publicly available information about Lampman’s personal life is limited.

No independently verified biographical sources were located establishing his occupation, marital status, family relationships, educational background, or residential address at the time he disappeared. Likewise, the available case records do not establish whether he had lived in San Francisco for many years or had arrived there shortly before his disappearance.

Those gaps are important. They prevent a reliable reconstruction of his daily routine, social connections, and activities in the period leading up to April 20, 1978.

Although the public record is sparse, Lampman’s disappearance represents the loss of a real individual whose life extended far beyond the limited details preserved in missing-person databases.

The Disappearance on April 20, 1978

April 20, 1978, is the last-seen date associated with James Lampman in the CaseTrace missing-person listing, which identifies NamUs as its underlying source.

San Francisco is identified as the relevant location, but the available records do not specify a street address, neighborhood, workplace, residence, or other precise location where Lampman was last observed.

There is also no verified public account establishing what he was doing that day.

The accessible information does not answer several basic questions: whether Lampman left home for an ordinary errand, whether he was traveling, whether someone witnessed his departure, or whether any personal possessions were found after he vanished.

No reliable source reviewed establishes that he was involved in an argument, threatened by another person, or experiencing a crisis immediately before his disappearance.

Such circumstances should not be assumed simply because the case remains unresolved.

The documented facts support a narrower conclusion: James Lampman was last seen on April 20, 1978, in connection with San Francisco, and his disappearance remains listed in missing-person resources.

Investigation History and Available Evidence

San Francisco Police Department involvement

The California Department of Justice identifies the San Francisco Police Department as the law enforcement agency associated with Lampman’s missing-person record.

The state lists police case number 782465194 and provides the department contact number (415) 553-1071.

This establishes that the disappearance has an identifiable law enforcement record. It does not, by itself, reveal the original investigative findings or whether the case has undergone a formal cold-case review.

Source: California DOJ Missing Person Search.

Initial searches and witness interviews

No verified public account of the original 1978 investigation was located that describes searches, witness interviews, neighborhood canvassing, or the collection of physical evidence.

It is therefore not possible to establish whether investigators searched a particular building, interviewed specific individuals, examined vehicles, or developed an early theory about Lampman’s disappearance.

The absence of those details from public sources does not prove that investigative work never occurred. It means that the extent and results of any such work could not be independently verified.

Physical and forensic evidence

No publicly confirmed physical evidence was identified in the reviewed sources.

In particular, no verified report was located describing recovered clothing, personal belongings, fingerprints, biological evidence, or a vehicle conclusively connected to the disappearance.

There is also no confirmed public information indicating that investigators have obtained a DNA profile from Lampman or his biological relatives.

Modern forensic techniques, including DNA comparisons and investigative genetic genealogy, have helped resolve some historical missing-person cases. However, there is no verified basis for claiming that these methods have been used in Lampman’s investigation.

Missing-person databases and identification records

Lampman’s disappearance appears in the California Department of Justice’s missing-person database.

A secondary missing-person listing maintained by CaseTrace also identifies a NamUs-associated record number, 31581, for James L. Lampman.

The CaseTrace entry lists his last-seen date as April 20, 1978, his age as 43, and his physical measurements as 5 feet 8 inches and 140 pounds.

Because the NamUs number was located through a secondary listing rather than independently confirmed on an accessible official NamUs case page, it should be treated as a secondary-source reference pending direct verification.

Source: CaseTrace — James L. Lampman.

Suspects, arrests, and criminal proceedings

No credible public source reviewed identifies an official suspect or person of interest in Lampman’s disappearance.

Similarly, no verified case-specific arrest, criminal charge, prosecution, or court judgment was located.

There is no publicly established evidence in the reviewed records that Lampman was murdered.

His case should therefore continue to be described as a missing-person investigation unless an authoritative source establishes a different classification.

Theories and Unresolved Questions

The limited information available about James Lampman’s disappearance leaves multiple possible explanations, but none can be supported as a specific investigative conclusion.

Could Lampman have left voluntarily?

Voluntary departure is one possibility sometimes considered in adult missing-person investigations.

However, there is no verified evidence that Lampman intended to leave San Francisco, begin a new life, or deliberately end contact with people who knew him.

Without contemporaneous statements, travel records, correspondence, or other supporting evidence, a voluntary disappearance remains speculation rather than an established explanation.

Could an accident or medical emergency have occurred?

An accident or unexpected medical event is another general possibility.

Nevertheless, no credible source reviewed identifies an accident scene, hospital admission, medical condition, or unidentified remains that investigators have connected to Lampman.

There is no factual basis for favoring this explanation over other possibilities.

Was foul play involved?

Because Lampman’s whereabouts remain unknown, the possibility of criminal involvement cannot be categorically excluded.

At the same time, no verified public record identifies evidence of an assault, abduction, homicide, or other violent crime connected to his disappearance.

It would be misleading to describe his case as a murder investigation without reliable confirmation.

Questions that remain unanswered

Among the most important unresolved questions are the exact location where Lampman was last seen, who last had contact with him, when authorities received the initial missing-person report, and whether any contemporaneous investigative records contain information that has never been publicly released.

It is also unknown from the reviewed sources whether investigators have compared his case with unidentified remains or obtained updated family-reference DNA.

These are questions for which additional records or official statements would be needed, not claims that particular evidence exists.

Latest Publicly Available Investigative Updates

As of October 18, 2026, the California Department of Justice continues to provide a searchable missing-person entry for James L. Lampman.

The available entry identifies the San Francisco Police Department and associates the disappearance with case number 782465194.

The CaseTrace listing also continues to display Lampman’s information and identifies NamUs as its listed source.

These records support the conclusion that his disappearance remains documented in public missing-person resources. They do not establish that a new investigative action has occurred.

No publicly confirmed recent investigative breakthroughs or developments were located in the sources reviewed.

Specifically, no verified recent announcement was found concerning an arrest, identification of remains, new forensic results, a named suspect, a formal case reopening, or a resolution of Lampman’s disappearance.

No confirmed recent family appeal or case-specific law enforcement news release was identified either.

A missing-person database entry that remains accessible or is newly indexed by a search engine should not be mistaken for evidence of a new investigative breakthrough.

For the most reliable current status, the San Francisco Police Department remains the appropriate agency to contact.

Conclusion: Remembering James L. Lampman

James L. Lampman was 43 years old when he disappeared from the public record in San Francisco on April 20, 1978.

Decades later, the essential circumstances remain unclear. The accessible records provide his identifying information, a last-seen date, an investigating agency, and case references, but they do not explain what happened to him.

There is no verified public evidence establishing whether he left voluntarily, suffered an accident, became the victim of a crime, or experienced some other unknown event.

The passage of time makes accurate historical records and firsthand information especially important. Someone who knew Lampman in 1978 may remember a detail that was never formally documented or that could help clarify his final known movements.

Anyone with credible information concerning James L. Lampman’s disappearance should contact the San Francisco Police Department at (415) 553-1071, the number listed in the California Department of Justice’s missing-person record.

Information can also be provided through the California Department of Justice missing-person hotline at 1-800-222-FIND (1-800-222-3463).

Even after nearly half a century, the central question remains unanswered: What happened to James L. Lampman after April 20, 1978?