Overview

Martin Blackwell was 39 years old when he was reported missing from Concord, California, on April 22, 2021. His disappearance is documented in publicly accessible missing-person directories, which identify Concord as his last known location and associate his case with National Missing and Unidentified Persons System (NamUs) reference MP79999.

Despite the existence of a missing-person record, publicly available information about the circumstances surrounding Blackwell’s disappearance is limited. The records reviewed do not establish where he was last seen within Concord, what he was doing before he disappeared, or whether investigators identified circumstances suggesting foul play.

Full Name: Martin Blackwell

Age at Disappearance: 39 years old

Date Last Seen: April 22, 2021

Last Known Location: Concord, Contra Costa County, California

Case Classification: Missing person

Missing-Person Database Reference: NamUs MP79999

Current Publicly Documented Status: Listed as missing in the reviewed public directories; no verified resolution was located.

Detailed Case Breakdown

Case Summary

Martin Blackwell was 39 years old when he was reported missing from Concord, California, on April 22, 2021. His disappearance is documented in publicly accessible missing-person directories, which identify Concord as his last known location and associate his case with National Missing and Unidentified Persons System (NamUs) reference MP79999.

Despite the existence of a missing-person record, publicly available information about the circumstances surrounding Blackwell’s disappearance is limited. The records reviewed do not establish where he was last seen within Concord, what he was doing before he disappeared, or whether investigators identified circumstances suggesting foul play.

Full Name: Martin Blackwell

Age at Disappearance: 39 years old

Date Last Seen: April 22, 2021

Last Known Location: Concord, Contra Costa County, California

Case Classification: Missing person

Missing-Person Database Reference: NamUs MP79999

Current Publicly Documented Status: Listed as missing in the reviewed public directories; no verified resolution was located.

Background and Circumstances of Martin Blackwell’s Disappearance

Martin Blackwell’s disappearance dates to April 22, 2021, in Concord, a city in Contra Costa County in California’s East Bay region. At the time, he was 39 years old.

Public missing-person listings describe Blackwell as a white male with brown hair and hazel eyes. His reported height was approximately 5 feet 10 inches, and his reported weight was approximately 145 pounds. These identifying characteristics may be useful when reviewing historical sightings or attempting to recognize him.

Beyond these identifying details, little independently verified biographical information is available. The reviewed sources do not establish his occupation, family background, living arrangements, daily routine, or the personal circumstances immediately preceding his disappearance.

The publicly listed last-seen date is April 22, 2021. However, the available records do not identify a specific street address, business, residence, or other location where Blackwell was last observed. They also do not establish whether he was traveling on foot, using a vehicle, or accompanied by another person.

No verified description of the clothing Blackwell was wearing when he disappeared was located in the reviewed material. Likewise, no confirmed public account establishes the circumstances under which someone first recognized that he was missing or the date on which a formal missing-person report was submitted.

These gaps are important. Without reliable information about Blackwell’s final known movements, it would be inappropriate to suggest that he voluntarily left the area, experienced an accident, encountered another person, or became the victim of a crime. Each possibility would require supporting evidence before it could be treated as part of the case history.

Investigation History and Available Evidence

Martin Blackwell’s disappearance appears in missing-person directories that identify April 22, 2021, as his last-seen date and associate his record with NamUs MP79999. This provides a publicly documented starting point for understanding the case, although a database listing does not reveal the full extent of any law enforcement investigation.

The reviewed sources do not identify the primary investigating law enforcement agency or provide a verified local police report number. They also do not establish when the initial investigation began, which investigative steps were completed, or whether particular areas of Concord or Contra Costa County were searched.

No independently verified public information was located describing witness interviews, surveillance recordings, recovered personal belongings, vehicle evidence, telephone records, financial activity, or forensic testing associated with Blackwell’s disappearance.

Similarly, the reviewed material does not document a publicly announced DNA comparison, investigative genetic genealogy effort, identification of remains, or forensic development directly connected to this case.

The absence of these details from accessible public sources should not be interpreted as proof that investigators never pursued them. Law enforcement agencies may conduct investigative work without releasing every detail, particularly when information could affect an ongoing inquiry or the privacy of people involved.

No official public announcement identifying a suspect or person of interest in Blackwell’s disappearance was verified. No arrest, criminal charge, or court proceeding was established as directly connected to his disappearance.

For these reasons, the documented evidence available to the public remains limited primarily to Blackwell’s identity, physical description, last-seen date, location, and missing-person database reference.

Theories and Unresolved Questions

The central unanswered question in Martin Blackwell’s case is what happened to him after April 22, 2021. The available public records do not provide enough information to establish a reliable sequence of events beyond his reported disappearance from Concord.

Several factual questions remain unresolved in the material reviewed: Where exactly was Blackwell last seen? Who last had confirmed contact with him? What was his intended destination, if any? Were there any documented sightings after April 22, 2021? Did investigators recover information that helped narrow the timeline of his disappearance?

These are investigative questions rather than established leads. No publicly verified evidence reviewed for this article provides answers to them.

There is also no verified basis for concluding that Blackwell disappeared voluntarily, experienced a medical emergency, suffered an accident, or was harmed by another person. Although such possibilities may arise in missing-person investigations generally, none should be presented as an established theory in this particular case without case-specific evidence.

No authenticated family statement explaining a preferred theory or expressing a particular suspicion was located. Accordingly, this article does not attribute beliefs or accusations to Blackwell’s relatives or acquaintances.

Until additional records or official findings become available, the circumstances surrounding his disappearance must remain classified as undetermined in this account.

Latest Publicly Available Investigative Updates

As of October 31, 2026, the reviewed public sources continue to provide historical missing-person information for Martin Blackwell, including his April 22, 2021, disappearance date and NamUs reference MP79999.

No publicly confirmed recent investigative breakthrough was located during research for this article. Specifically, no verified official announcement was found establishing that Blackwell had been located, that remains had been positively identified as his, or that criminal charges had been filed in connection with his disappearance.

No verified recent announcement of renewed searches, newly recovered evidence, DNA identification results, or a formal cold-case review was located.

The continued appearance of a historical missing-person record should not itself be mistaken for a new investigative development. Likewise, the absence of a public resolution announcement does not independently confirm the complete present status of every law enforcement record.

Any future information concerning Blackwell’s whereabouts, investigative findings, or case classification should be evaluated against official agency statements and authenticated missing-person records before being reported as a confirmed development.

Conclusion and Public Appeal for Information

Martin Blackwell was 39 years old when he disappeared from Concord, California, on April 22, 2021. More than five years later, the publicly available information reviewed for this article leaves fundamental questions unanswered about his last confirmed movements and what happened afterward.

His case illustrates the difficulty of understanding a disappearance when few investigative details have been publicly released. The limited information available does not justify assumptions about criminal involvement, voluntary disappearance, or any particular outcome.

Anyone who possesses firsthand information about Blackwell’s whereabouts around April 22, 2021, or credible information concerning his subsequent movements is encouraged to contact appropriate law enforcement authorities or the California Department of Justice Missing Persons program.

Even information that appears minor may be relevant when it can be independently verified and placed within an accurate timeline. Members of the public should avoid spreading unconfirmed accusations or attempting to confront anyone they believe may have information.

Until a verified resolution is made public, Martin Blackwell’s disappearance remains an unanswered missing-person case in the records reviewed. Continued attention, responsible information sharing, and credible tips may help bring greater clarity to what happened in Concord in April 2021.