Overview

Full name: Ricardo Marquez

Age at disappearance: 45

Date last seen: July 8, 1977

Last known location: Pomona, Los Angeles County, California

Case classification: Missing person

Current case status: Publicly listed as missing; no verified resolution located as of October 18, 2026

NamUs reference: 107692 (identified by secondary case directory)

Doe Network reference: 6818DMCA

Circumstances: Ricardo Marquez disappeared from Pomona in July 1977. Publicly accessible case listings establish his reported disappearance date and location, but do not provide a verified explanation for what happened or identify the circumstances of his final known movements.

Detailed Case Breakdown

Ricardo Marquez: The Unsolved 1977 Disappearance of a 45-Year-Old Man from Pomona, California

Nearly five decades after Ricardo Marquez disappeared from Pomona, California, on July 8, 1977, fundamental questions remain unanswered about what happened to him and where he went.

Marquez was 45 years old when he was last reported seen. His disappearance is documented in missing-person records, including a listing associated with the National Missing and Unidentified Persons System (NamUs) and a case entry added to the Doe Network in August 2025.

Despite the passage of time, publicly accessible information about his disappearance remains limited. There is no verified public evidence establishing that Marquez was the victim of a homicide, and no confirmed account explaining why he vanished.

His case illustrates the challenges surrounding long-term missing-person investigations, particularly those dating back to an era before modern digital recordkeeping and forensic technology.

Case Summary

Full name: Ricardo Marquez

Age at disappearance: 45

Date last seen: July 8, 1977

Last known location: Pomona, Los Angeles County, California

Case classification: Missing person

Current case status: Publicly listed as missing; no verified resolution located as of October 18, 2026

NamUs reference: 107692 (identified by secondary case directory)

Doe Network reference: 6818DMCA

Circumstances: Ricardo Marquez disappeared from Pomona in July 1977. Publicly accessible case listings establish his reported disappearance date and location, but do not provide a verified explanation for what happened or identify the circumstances of his final known movements.

Sources: CaseTrace Missing Persons Directory and Doe Network Case Updates.

Ricardo Marquez’s Background and Disappearance

What is known about Ricardo Marquez?

Ricardo Marquez was a 45-year-old man whose disappearance is associated with Pomona, a city in eastern Los Angeles County, California.

The publicly indexed CaseTrace directory identifies Marquez as missing from Pomona since July 8, 1977, and associates his listing with NamUs case number 107692.

His name also appears in the Doe Network’s historical missing-person records, under reference 6818DMCA. The organization recorded the addition of his case on August 16, 2025.

Beyond these identifying details, publicly verified biographical information is scarce.

His occupation, family relationships, birthplace, residential address, and personal circumstances before his disappearance could not be independently established from the available sources. Rather than speculate about his private life, it is important to acknowledge these gaps.

The disappearance on July 8, 1977

July 8, 1977, is the reported last-seen date associated with Ricardo Marquez’s disappearance.

The available case directory identifies Pomona as the location from which he went missing. However, it does not establish the exact address or location of his final confirmed sighting.

Several important details remain undocumented in the sources reviewed, including whether Marquez was traveling, working, visiting someone, or following his usual daily routine when he disappeared.

There is also no independently verified public account identifying the person who last saw him, the time he was last observed, or the circumstances under which authorities were initially notified.

These omissions should not be interpreted as evidence that investigators never obtained such information. Historical police files and family records may contain details that are not publicly accessible.

What can be established is that Marquez’s disappearance dates to 1977 and that his name continued to appear in missing-person resources decades afterward.

Source: CaseTrace Pomona Missing Persons.

Investigation History and Available Evidence

Early investigative efforts

The original law enforcement investigation into Ricardo Marquez’s disappearance could not be reconstructed from the publicly available materials reviewed.

No verified original police report, contemporary newspaper account, search-operation record, or documented witness statement was located that specifically describes the investigative response in July 1977.

Consequently, it would be inaccurate to claim that authorities conducted particular searches, interviewed named individuals, recovered evidence, or pursued specific suspects.

The absence of those details from searchable sources does not establish that no investigation occurred. It means that the investigative history could not be independently confirmed.

Missing-person database records

One of the clearest publicly accessible references to Marquez is the CaseTrace directory for Pomona, which identifies him by name, disappearance date, age, and associated NamUs reference.

The referenced NamUs case is numbered 107692. However, the individual case details could not be independently extracted from the publicly accessible NamUs page during this review. The reference is therefore attributed to the secondary directory rather than presented as a directly inspected NamUs record.

The Doe Network provides another important record of his disappearance. Its August 16, 2025, update identifies Ricardo Marquez as a person missing from California since 1977.

The Doe Network assigns the case reference 6818DMCA, which is a database identification number and should not be confused with an official police report number.

These listings help preserve Marquez’s name and identifying case information for future reference.

Sources: CaseTrace Directory and Doe Network Updates.

Physical evidence and forensic testing

No publicly verified report was located describing physical evidence recovered in connection with Marquez’s disappearance.

Likewise, the sources reviewed did not establish whether investigators possess fingerprints, dental records, DNA reference samples, or personal belongings suitable for forensic comparison.

There is no publicly confirmed case-specific information showing that forensic genetic genealogy has been performed, that unidentified human remains have been matched to Marquez, or that DNA testing has produced a new investigative lead.

Modern forensic methods have helped resolve other long-standing missing-person investigations, but their availability does not mean they have been applied in this particular case.

Suspects, arrests, and criminal proceedings

No official source reviewed identified a suspect or person of interest in Ricardo Marquez’s disappearance.

No verified arrest, criminal charge, homicide prosecution, or court ruling connected specifically to this 1977 Pomona missing-person case was located.

Marquez’s case should therefore continue to be described as a disappearance, not as an established homicide.

Theories and Unresolved Questions

The limited public record leaves several possibilities unresolved, but none can responsibly be presented as an established explanation.

Was Ricardo Marquez the victim of foul play?

Foul play is a question that can arise in any unexplained disappearance, particularly one that remains unresolved for decades.

However, no publicly verified law enforcement statement was located establishing that Marquez was abducted, assaulted, or murdered.

There is also no confirmed public evidence identifying a motive or suspect.

Without supporting evidence, a criminal explanation remains speculative.

Could Marquez have left voluntarily?

Another general possibility in missing-person investigations is that an individual left an area voluntarily.

In Marquez’s case, there is no verified public account showing that he intended to relocate, abandon his existing life, or travel to another destination.

Accordingly, voluntary disappearance cannot be treated as a factual explanation.

Could unidentified remains provide answers?

Long-term missing-person investigations sometimes involve comparisons between missing individuals and unidentified human remains.

NamUs supports the collection and comparison of missing-person and unidentified-person information.

Nevertheless, no confirmed match involving Ricardo Marquez was identified in the publicly available materials reviewed.

There is also no verified case-specific announcement establishing that investigators are actively pursuing a particular unidentified-person comparison.

Questions that remain unanswered

The most important unresolved questions concern Marquez’s final known movements, the circumstances surrounding his disappearance, and whether investigators possess information that has never been released publicly.

It remains unclear who last saw him, whether he had access to transportation, whether he communicated with anyone afterward, and whether any physical evidence survives from the original investigation.

Answers to these questions could substantially change the understanding of the case. At present, they remain unknown rather than evidence of any particular theory.

Latest Publicly Available Investigative Updates

August 16, 2025: Doe Network adds Ricardo Marquez

The most recent specifically dated, case-related development verified during this research was the addition of Ricardo Marquez to the Doe Network’s records on August 16, 2025.

The organization’s update identifies his case as 6818DMCA and describes him as missing from California since 1977.

This is a meaningful development in the public documentation of his disappearance because it makes another searchable missing-person record available.

However, the August 2025 listing is a database addition, not a confirmed investigative breakthrough.

It does not establish that investigators discovered new evidence, identified a suspect, recovered remains, or reopened a previously closed investigation.

Source: Doe Network Site Updates.

Status as of October 18, 2026

As of October 18, 2026, no publicly confirmed recent investigative developments were located beyond the documented case-listing activity.

Specifically, the sources reviewed did not establish any newly announced DNA results, genetic genealogy findings, identified remains, arrests, criminal proceedings, official cold-case breakthroughs, or new law enforcement appeals specific to Marquez.

No verified recent family statement or public awareness campaign directly connected to his case was located.

This does not prove that investigators have stopped working on the disappearance. Investigative activity may occur without public announcements.

The responsible conclusion is that Marquez remains publicly documented as missing, while the available evidence does not establish what happened to him.

Conclusion: Remembering Ricardo Marquez and Seeking Answers

Ricardo Marquez was 45 years old when he disappeared from Pomona, California, on July 8, 1977.

More than 49 years later, the publicly accessible record still does not explain where he went, why he disappeared, or what ultimately happened to him.

The addition of his name to the Doe Network in 2025 helps ensure that his disappearance remains documented, but it does not resolve the central questions surrounding his case.

Anyone with credible firsthand information about Ricardo Marquez, his activities around July 8, 1977, or his possible whereabouts afterward is encouraged to contact law enforcement.

The Pomona Police Department lists its Detective Bureau at (909) 620-2095 and its 24-hour non-emergency dispatch line at (909) 622-1241. These are verified department contacts, although the department’s role as the original investigating agency in Marquez’s case could not be independently confirmed.

Anyone submitting information should identify the missing person as Ricardo Marquez, last seen July 8, 1977, in Pomona, California, and provide the known database references.

Even decades after a disappearance, reliable information can help clarify the historical record and potentially assist investigators in determining what happened.