Overview

Gregory Paul Anspaugh was 29 years old when he disappeared from Concord, California, on March 3, 1999. More than 27 years later, his whereabouts remain unknown, and his disappearance continues to be documented in California’s missing-person records.

Full Name: Gregory Paul Anspaugh

Date of Birth: February 21, 1970

Age at Disappearance: 29 years old

Date Last Seen: March 3, 1999

Last Known Location: Concord, Contra Costa County, California

Case Classification: Missing Person

Publicly Documented Status: Unresolved; Gregory remains listed in missing-person records.

Investigating Agency: Concord Police Department

Case Number: 99-5564

NamUs Reference: MP23476

Physical Description: White male, approximately 5 feet 9 inches tall and 160 pounds at the time of his disappearance, with brown hair and brown eyes.

Summary of Circumstances: Gregory was last reported seen in Concord on March 3, 1999, and has not been heard from since. Publicly available case descriptions provide few details about the circumstances surrounding his disappearance. No verified public account establishes where he was going, whom he was with, or what happened afterward.

Detailed Case Breakdown

Case Summary

Gregory Paul Anspaugh was 29 years old when he disappeared from Concord, California, on March 3, 1999. More than 27 years later, his whereabouts remain unknown, and his disappearance continues to be documented in California’s missing-person records.

Full Name: Gregory Paul Anspaugh

Date of Birth: February 21, 1970

Age at Disappearance: 29 years old

Date Last Seen: March 3, 1999

Last Known Location: Concord, Contra Costa County, California

Case Classification: Missing Person

Publicly Documented Status: Unresolved; Gregory remains listed in missing-person records.

Investigating Agency: Concord Police Department

Case Number: 99-5564

NamUs Reference: MP23476

Physical Description: White male, approximately 5 feet 9 inches tall and 160 pounds at the time of his disappearance, with brown hair and brown eyes.

Summary of Circumstances: Gregory was last reported seen in Concord on March 3, 1999, and has not been heard from since. Publicly available case descriptions provide few details about the circumstances surrounding his disappearance. No verified public account establishes where he was going, whom he was with, or what happened afterward.

Background and Circumstances of Gregory Anspaugh’s Disappearance

Gregory Paul Anspaugh was born on February 21, 1970. He had recently celebrated his 29th birthday when he went missing in Concord, a city in Contra Costa County in California’s East Bay region.

Although his name appears in established missing-person resources, relatively little personal information about Gregory has been made publicly available. Verified sources do not provide a detailed account of his childhood, education, employment, relationships, or daily activities before his disappearance.

What is documented is the date and general location of his disappearance. On March 3, 1999, Gregory was last seen in Concord. He subsequently vanished from public view and has not been heard from again, according to his published missing-person profile.

The available records do not identify the specific street, residence, business, or other location where Gregory was last seen. They also do not establish his last known activities, intended destination, transportation arrangements, or the identity of the person who last saw him.

Those missing details make it difficult to reconstruct his final known movements. There is no sufficiently documented public account explaining whether Gregory left voluntarily, encountered an emergency, suffered an accident, or became the victim of a crime.

His physical description remains an important identifying detail. At the time he disappeared, Gregory was approximately 5 feet 9 inches tall, weighed 160 pounds, and had brown hair and brown eyes. Photographs associated with his missing-person records show his appearance around the time of his disappearance.

For anyone who knew Gregory in 1999, even a seemingly minor recollection about his movements, acquaintances, or plans during that period could provide context that is absent from the publicly available case history.

Investigation History and Available Evidence

The Concord Police Department is identified as the investigating agency in Gregory Anspaugh’s disappearance. The California Department of Justice lists the department alongside the official case number 99-5564.

Gregory’s inclusion in the California missing-person database establishes that his disappearance has been formally documented by law enforcement. His case has also been publicized through The Charley Project and referenced in missing-person resources using NamUs identification number MP23476.

However, the existence of these records does not establish what investigative steps were taken immediately after Gregory disappeared. No sufficiently detailed public investigative chronology was located describing the initial police response, interviews, neighborhood inquiries, searches, or follow-up investigations.

Witnesses and Last Known Movements

Publicly accessible case summaries do not identify a confirmed last witness or provide a detailed witness statement concerning Gregory’s disappearance. They do not establish a last known conversation, sighting time, vehicle description, or documented route of travel.

Without that information, the publicly documented timeline begins and ends with the reported disappearance date of March 3, 1999. Any more specific account of his final movements would require additional verified investigative records or reliable firsthand evidence.

Physical and Forensic Evidence

No publicly verified evidence inventory was located for Gregory’s case. Available sources do not identify recovered personal belongings, a vehicle connected to the disappearance, surveillance recordings, or forensic findings that explain what happened.

Likewise, no publicly confirmed case-specific announcement was located describing a DNA identification, investigative genetic genealogy result, or identification of human remains connected to Gregory.

This lack of public information should not be interpreted as proof that investigators collected no evidence or pursued no leads. Law enforcement agencies may retain investigative information that has never been publicly released.

Missing-Person Records and Public Awareness

Gregory’s disappearance has remained accessible through missing-person databases and independent case-awareness resources. The Charley Project records his disappearance date, physical description, investigating agency, and the limited known circumstances.

The California Department of Justice also maintains a missing-person listing for Gregory, including his identifying information and the Concord Police Department’s case reference.

These records help preserve identifying details and provide a means for the public to locate the responsible law enforcement agency. They do not, by themselves, demonstrate that a new lead or investigative breakthrough has occurred.

Theories and Unresolved Questions

The central unanswered question in Gregory Anspaugh’s case is what happened after he was last seen in Concord on March 3, 1999.

Because the available public record contains so few details, it does not support a specific explanation for his disappearance. There is no verified public basis for concluding that he intentionally left his previous life, suffered a fatal accident, or was harmed by another person.

Importantly, Gregory’s disappearance has not been established as a homicide in the sources reviewed. No publicly confirmed suspect, arrest, criminal charge, or homicide finding was located in connection with his case.

Several fundamental questions remain unresolved in the publicly available information. Where exactly was Gregory last seen? What was he doing on the day he disappeared? Did he have plans to meet someone or travel elsewhere? Were there any reported sightings after March 3, 1999? Did investigators develop leads that were never made public?

These questions identify gaps in the available record rather than established investigative theories. Without reliable supporting evidence, attributing Gregory’s disappearance to a particular person, motive, or event would be speculation.

There is also no verified public statement from Gregory’s family in the reviewed material establishing a particular family theory about what happened. Their views should not be assumed or represented without an attributable source.

For a disappearance dating to 1999, information remembered by former friends, coworkers, neighbors, or acquaintances could potentially help clarify the circumstances. Whether such information would be new to investigators is unknown.

Latest Publicly Available Investigative Updates

As of October 30, 2026, no publicly confirmed recent investigative breakthrough was located in Gregory Paul Anspaugh’s disappearance.

The California Department of Justice continues to publish his identifying information in its missing-person records, with the Concord Police Department listed as the responsible agency and case number 99-5564.

The Charley Project’s published case history identifies March 21, 2012, as its last recorded profile update. That date represents an update to a missing-person resource, not a confirmed development in the police investigation.

An independent missing-person case page maintained by Uncovered lists a November 3, 2022, update date. That date likewise should not be interpreted as evidence of a new witness, discovery, or law enforcement breakthrough.

No verified recent announcement was located concerning an arrest, charges, a named suspect, a forensic identification, newly recovered remains, or a resolution of Gregory’s disappearance.

It is not publicly established whether investigators have recently conducted additional interviews, reviewed physical evidence, obtained new tips, or reconsidered earlier leads. The absence of a published update does not necessarily mean investigative work has stopped.

The most important publicly documented facts remain unchanged: Gregory disappeared in Concord on March 3, 1999, and his whereabouts have not been established in the sources reviewed.

Conclusion and Public Appeal for Information

Gregory Paul Anspaugh was just 29 years old when he disappeared from Concord, California, on March 3, 1999. More than two decades have passed without a publicly documented explanation of what happened to him.

His case illustrates the difficulty of understanding a long-term disappearance when the available public record contains little information about the missing person’s final known activities. The confirmed facts establish when and where Gregory was last seen, but they do not explain the circumstances that followed.

Anyone who knew Gregory in the late 1990s, remembers his activities around March 1999, or possesses information about his disappearance is encouraged to contact the Concord Police Department.

The department’s published missing-person contact number is 925-671-3240. Callers may reference case number 99-5564 when providing information. The California Department of Justice also maintains a missing-person information hotline at 1-800-222-3463.

Information should be provided directly to law enforcement rather than shared as unverified accusations or speculation online.

Gregory Anspaugh’s disappearance remains an unanswered question. Continued public awareness may help reach someone who remembers a relevant detail, recognizes his photograph, or has information that could assist investigators in determining what happened.