Overview

Martin Glenn Demello, also known as Marty, was 61 years old when he disappeared from Richmond, California, in July 2020. More than six years later, his disappearance remains an unresolved missing-person case, with few details publicly available about the circumstances surrounding his last known whereabouts.

Full Name: Martin Glenn Demello

Also Known As: Marty Glen Demello and other variations of his name

Date of Birth: September 27, 1958

Age at Disappearance: 61 years old

Date Last Seen: July 2, 2020, according to the California Department of Justice narrative; July 6, 2020, is recorded as the official missing date

Last Known Location: Richmond, Contra Costa County, California

Case Classification: Missing Person

Current Public Status: Unresolved; listed in the California Department of Justice missing-person database

Investigating Agency: Richmond Police Department

Police Case Number: 20-6229

Despite the passage of time, publicly accessible investigative information remains limited. Authorities have not publicly established what happened to Demello, where he went after his last reported sighting, or whether his disappearance involved an accident, voluntary departure, medical emergency, or criminal activity. None of those possibilities has been confirmed as the explanation for his disappearance.

Detailed Case Breakdown

Case Summary

Martin Glenn Demello, also known as Marty, was 61 years old when he disappeared from Richmond, California, in July 2020. More than six years later, his disappearance remains an unresolved missing-person case, with few details publicly available about the circumstances surrounding his last known whereabouts.

Full Name: Martin Glenn Demello

Also Known As: Marty Glen Demello and other variations of his name

Date of Birth: September 27, 1958

Age at Disappearance: 61 years old

Date Last Seen: July 2, 2020, according to the California Department of Justice narrative; July 6, 2020, is recorded as the official missing date

Last Known Location: Richmond, Contra Costa County, California

Case Classification: Missing Person

Current Public Status: Unresolved; listed in the California Department of Justice missing-person database

Investigating Agency: Richmond Police Department

Police Case Number: 20-6229

Despite the passage of time, publicly accessible investigative information remains limited. Authorities have not publicly established what happened to Demello, where he went after his last reported sighting, or whether his disappearance involved an accident, voluntary departure, medical emergency, or criminal activity. None of those possibilities has been confirmed as the explanation for his disappearance.

Background and Circumstances of the Disappearance

Martin Glenn Demello was born on September 27, 1958. His disappearance occurred in the summer of 2020, when he was 61 years old. Public missing-person records identify Richmond, a city in California’s Contra Costa County in the San Francisco Bay Area, as his last known location.

Although his personal history has not been extensively documented in accessible official records, investigators have released physical characteristics and identifying features that could help members of the public recognize him.

At the time he was reported missing, Demello was described as a white male, approximately 5 feet 9 inches tall and weighing 155 pounds. He had brown hair and blue eyes.

One of his most distinguishing characteristics was the presence of numerous tattoos. The California Department of Justice identifies tattoos on his left ear, right shoulder, chest, abdomen, both arms and hands, and right calf. The precise designs of these tattoos are not described in the public state record.

The state database also records several alternative names or spelling variations, including Martin Glen Denello, Marty Glen Demello, Martin Glenn Mello, and Martine Glenn Demello. These variations may be important when reviewing historical records or information provided by individuals who knew him under a different name.

The Last Reported Sighting in July 2020

Demello’s last reported whereabouts place him in Richmond in early July 2020. The California Department of Justice records his missing date as July 6, 2020, but the accompanying description states that he was last seen on July 2, 2020.

This distinction is important because the publicly available record does not explain whether July 6 represents the date the disappearance was reported, a date used for administrative purposes, or another investigative milestone. The two dates should not be treated as interchangeable without additional confirmation from the investigating agency.

The public record does not establish the specific street address where Demello was last seen, who last encountered him, what he was doing immediately before disappearing, or whether he was traveling on foot or using a vehicle.

There is also no verified public description of the clothing he was wearing when he disappeared. Without those details, reconstructing his final known movements remains difficult.

Investigation History and Available Evidence

The Richmond Police Department is identified by the California Department of Justice as the law enforcement agency responsible for Demello’s missing-person case. The publicly listed police reference number is 20-6229.

Demello’s inclusion in the California Department of Justice missing-person database provides an official public record of his disappearance, physical description, identifying tattoos, and the agency to contact with information.

However, the publicly accessible information does not provide a detailed account of the initial police response or the investigative steps undertaken after he disappeared.

Search Efforts and Witness Information

No sufficiently documented public account was located establishing the dates, locations, or results of any searches specifically conducted for Demello. Likewise, no verified witness statement has been identified that explains his movements after his last reported sighting.

This lack of publicly released information does not establish that investigators failed to conduct searches or interview witnesses. It means those activities and their results could not be independently confirmed from the available sources.

Physical and Forensic Evidence

The California Department of Justice record provides identifying information but does not disclose recovered physical evidence connected to Demello’s disappearance.

No publicly confirmed information was located describing recovered personal belongings, surveillance footage, forensic testing, DNA matches, or investigative findings that establish what happened to him.

The state listing indicates that dental X-rays are not available in the public record. This entry should not be interpreted as proof that investigators possess no other identification materials or biological reference samples.

Suspects, Arrests, and Criminal Proceedings

No verified public announcement identifying a suspect, person of interest, arrest, or criminal prosecution directly connected to Demello’s disappearance was located.

His case should therefore continue to be described as a missing-person investigation rather than a confirmed homicide. There is no reliable publicly established evidence supporting a specific criminal accusation or identifying any individual as responsible for his disappearance.

Theories and Unresolved Questions

The central question in Martin Demello’s case remains what happened after he was last seen in Richmond in July 2020.

Because investigators have not publicly established the circumstances surrounding his disappearance, there is insufficient evidence to identify a reliable explanation.

Possible explanations for an unexplained disappearance can include an accident, a medical emergency, an intentional departure, or involvement by another person. In Demello’s case, these remain general possibilities rather than verified investigative theories or findings.

Where Was Demello Last Seen?

Although Richmond is established as the last known city, the precise location of Demello’s final reported sighting has not been publicly documented in the reviewed official record.

Additional information about the location, circumstances, and people present during his final known movements could help establish a more complete timeline.

What Happened Between July 2 and July 6?

The discrepancy between the July 2 last-seen narrative and the July 6 missing-date field remains an important unresolved detail in the publicly available documentation.

Clarification from investigators could establish whether these dates represent separate events and whether any independently verified contact occurred during that period.

Could His Tattoos Help Identify Him?

Demello’s numerous tattoos are among the strongest distinguishing physical characteristics described in the official missing-person listing.

Someone who encountered a man matching his general description might not remember his name but could remember distinctive tattoos on his hands, arms, ear, or other visible areas.

Any potentially relevant recollection should be provided directly to investigators rather than treated as a confirmed sighting without verification.

Latest Publicly Available Investigative Updates

As of October 31, 2026, Martin Glenn Demello continues to appear in the California Department of Justice public missing-person records. The listing identifies the Richmond Police Department as the reporting agency and retains the original case reference number.

No publicly confirmed recent investigative breakthrough was located in the reviewed sources. In particular, no verified announcement was found establishing that Demello had been located, that remains had been positively identified as his, or that a suspect had been arrested in connection with his disappearance.

No verified public update was identified documenting new DNA results, forensic genetic genealogy findings, an official age-progression release, or a newly announced cold-case review.

Independent missing-person awareness listings have continued to circulate Demello’s name and identifying details. These listings can help maintain public visibility, but their publication or continued availability does not by itself establish new investigative activity.

The continued presence of his name in the state’s missing-person database is the clearest publicly accessible indication of his unresolved status. Because law enforcement may withhold investigative details, the absence of public announcements should not be interpreted as proof that no investigative work has occurred.

Conclusion and Public Appeal for Information

Martin Glenn Demello disappeared from Richmond, California, in July 2020, leaving behind a case with few publicly established answers. He was 61 years old at the time, and his last reported whereabouts remain tied to the first days of that month.

While his disappearance has not been publicly classified as a homicide, the lack of a confirmed explanation means important questions remain unanswered. What happened after his final reported sighting? Did someone encounter him in the days that followed? Could information that once seemed insignificant help investigators reconstruct his movements?

Anyone who knew Demello, encountered him in Richmond during early July 2020, or possesses information about his subsequent whereabouts is encouraged to contact the Richmond Police Department at 510-620-6675. The department’s case reference is 20-6229.

Information may also be provided through the California Department of Justice missing-person assistance hotline at 1-800-222-3463.

Even after years have passed, a remembered conversation, an overlooked encounter, or a previously unreported detail could help authorities clarify what happened. Information should be directed to law enforcement rather than circulated as unverified allegations.

Martin Glenn Demello remains missing in the publicly available official record. Until reliable evidence establishes his whereabouts, his disappearance remains an unanswered question deserving continued attention and careful, factual reporting.