Overview

Full name: Matthew Nolan

Age at disappearance: 21 years old

Date of birth: July 10, 1957

Date last seen: April 14, 1979

Last known location: Sonoma County, California

City: Not publicly specified

County: Sonoma County

State: California

Case classification: Endangered missing person

Current case status: Unresolved; listed as missing

Investigating agency: Sonoma County Sheriff’s Department

Official case number: 3524-25

NamUs reference: MP122880, identified by secondary case directories

Physical description: White male, brown hair, brown eyes, approximately 6 feet tall and 160 pounds at the time of his disappearance.

Clothing last reported: Blue hooded sweatshirt and tan jungle pants.

Main circumstances: Matthew disappeared in Sonoma County on April 14, 1979, and has not been heard from since. Publicly available records identify schizophrenia as a medical condition but do not explain the circumstances immediately preceding his disappearance.

Detailed Case Breakdown

Matthew Nolan Missing Since 1979: The Unsolved Disappearance of a 21-Year-Old Man in Sonoma County, California

On April 14, 1979, 21-year-old Matthew Nolan disappeared in Sonoma County, California. More than 47 years later, his whereabouts remain unknown, and the publicly available information about the circumstances of his disappearance is remarkably limited.

Matthew was just three months away from his 22nd birthday when he vanished. Records maintained by the California Department of Justice identify him as a missing person and list the Sonoma County Sheriff’s Department as the reporting law enforcement agency.

His disappearance remains an unresolved mystery. Public records provide a description of Matthew, his last known location, and his date of disappearance, but offer little information about what happened that day or the investigation that followed.

Case Summary

Full name: Matthew Nolan

Age at disappearance: 21 years old

Date of birth: July 10, 1957

Date last seen: April 14, 1979

Last known location: Sonoma County, California

City: Not publicly specified

County: Sonoma County

State: California

Case classification: Endangered missing person

Current case status: Unresolved; listed as missing

Investigating agency: Sonoma County Sheriff’s Department

Official case number: 3524-25

NamUs reference: MP122880, identified by secondary case directories

Physical description: White male, brown hair, brown eyes, approximately 6 feet tall and 160 pounds at the time of his disappearance.

Clothing last reported: Blue hooded sweatshirt and tan jungle pants.

Main circumstances: Matthew disappeared in Sonoma County on April 14, 1979, and has not been heard from since. Publicly available records identify schizophrenia as a medical condition but do not explain the circumstances immediately preceding his disappearance.

Sources: California Department of Justice; The Charley Project; CaseTrace.

Matthew Nolan’s Background and Life Before His Disappearance

Matthew Nolan was born on July 10, 1957. By April 1979, he was a young adult living during a period when California’s communities, transportation systems, and mental health services were undergoing significant changes.

However, there is little verified public information about Matthew’s personal life. Available case profiles do not establish his occupation, educational background, family relationships, residential address, or daily activities before his disappearance.

The California Department of Justice records his height as 6 feet and his weight as approximately 160 pounds. He had brown hair and brown eyes.

His reported clothing consisted of a blue hooded sweatshirt and tan jungle pants. These details remain important identifying characteristics, particularly for anyone who may remember encountering Matthew around the time he disappeared.

Matthew’s Medical Condition

The California Department of Justice states that Matthew had schizophrenia, a mental health condition that can affect a person’s perceptions, thoughts, and experiences.

The Charley Project also identifies schizophrenia as a medical condition associated with his case.

This information is relevant because an individual’s medical needs may influence how authorities assess risk during a disappearance. However, the public records do not establish whether Matthew was experiencing symptoms, receiving treatment, taking medication, or experiencing a medical crisis on April 14, 1979.

It would therefore be inappropriate to assume that his diagnosis caused his disappearance or explains what happened to him.

His medical history should be considered with compassion and without speculation.

Sources: California Department of Justice; The Charley Project.

The Disappearance of Matthew Nolan on April 14, 1979

Matthew Nolan was last seen somewhere in Sonoma County, California, on Saturday, April 14, 1979.

The exact location of his last confirmed sighting has not been identified in the publicly available case records reviewed. Neither the California Department of Justice nor The Charley Project provides a street address, neighborhood, town, or specific landmark associated with his disappearance.

The available records also do not identify who last saw him, what time he disappeared, or what he was doing immediately beforehand.

There is no verified public account establishing whether Matthew was walking, traveling in a vehicle, visiting someone, or leaving a particular residence when he went missing.

What is documented is that he disappeared on April 14 and has not been heard from since.

What Was Matthew Wearing?

At the time of his disappearance, Matthew was reportedly wearing:

• A blue hooded sweatshirt.
• Tan jungle pants.

His height, weight, hair color, and eye color are also documented in the state missing-person record.

These identifying details may help people who were in Sonoma County in 1979 recall an encounter or recognize Matthew in historical photographs.

What Happened After He Was Last Seen?

The publicly available records do not establish how much time passed before Matthew was reported missing, who made the report, or the precise circumstances that prompted the initial investigation.

There is also no verified public description of his intended destination or whether he had expressed plans to leave the area.

The absence of these details is one of the most significant limitations in reconstructing the events surrounding his disappearance.

Source: California Department of Justice.

Investigation History and Available Evidence

The Sonoma County Sheriff’s Department is identified by the California Department of Justice as the law enforcement agency responsible for Matthew Nolan’s missing-person case.

The official California record associates his disappearance with case number 3524-25.

Although the case has remained publicly documented for decades, detailed information about the original investigation is not readily available.

Initial Search and Investigative Efforts

No verified public report located for this article describes the initial search for Matthew, including whether deputies organized ground searches, interviewed witnesses, distributed missing-person bulletins, or investigated particular locations.

This does not mean those investigative activities never occurred. It means their details could not be established from the public sources reviewed.

Without access to the original investigative file, it is not possible to determine which leads authorities pursued or what conclusions they reached.

Physical and Forensic Evidence

The California Department of Justice record identifies Matthew’s physical characteristics and reported clothing, but it does not describe any recovered physical evidence.

No publicly confirmed information was located identifying:

• Personal belongings recovered in connection with the disappearance.
• A vehicle associated with the circumstances of his disappearance.
• Forensic evidence linking Matthew to a specific location.
• DNA testing results or investigative genetic genealogy findings.
• Human remains positively identified as Matthew Nolan.

The California record specifically indicates that dental X-rays are not available. It does not establish whether other medical records, biological reference samples, or identification materials are held privately or by investigators.

Witnesses, Suspects, and Persons of Interest

The available official case profile does not identify a publicly named witness, suspect, or person of interest.

No verified law enforcement statement reviewed for this article establishes that Matthew was abducted, assaulted, or killed.

His disappearance is classified as an endangered missing-person case by The Charley Project, not as a confirmed homicide.

Sources: California Department of Justice; The Charley Project.

Theories and Unresolved Questions

The circumstances of Matthew Nolan’s disappearance remain unclear. Because so little information has been made public, it is essential to distinguish documented facts from possibilities that have not been substantiated.

Could Matthew Have Left Sonoma County Voluntarily?

One possibility in a long-term missing-person investigation is that an individual left their last known area and traveled elsewhere.

However, no verified public evidence establishes that Matthew voluntarily left Sonoma County, intended to relocate, or was subsequently seen in another community.

This possibility should not be treated as a factual explanation.

Could His Medical Condition Have Played a Role?

Matthew’s documented schizophrenia raises questions about whether he may have needed assistance at the time of his disappearance.

Nevertheless, there is no publicly confirmed evidence establishing that he was disoriented, experiencing a psychiatric crisis, or unable to care for himself when he vanished.

His diagnosis alone cannot establish the circumstances of his disappearance.

Could Matthew Have Been the Victim of a Crime?

Criminal involvement cannot be established or excluded solely from the limited public information.

No verified evidence reviewed for this article confirms foul play, and no suspect has been publicly identified in the sources examined.

There is consequently no factual basis for describing Matthew’s disappearance as a confirmed homicide.

Questions That Remain Unanswered

Several important questions continue to surround the case:

• Where exactly was Matthew last seen on April 14, 1979?
• Who was the last person known to have spoken with him?
• Was he expected to meet someone or travel to another location?
• What searches and interviews were conducted during the initial investigation?
• Were any possible sightings reported after his disappearance?
• Does the original investigative file contain information that has never been publicly released?
• Have modern missing-person identification methods been applied to the case?

These are unresolved investigative questions, not evidence that any particular scenario occurred.

Latest Publicly Available Investigative Updates — October 2026

As of October 18, 2026, Matthew Nolan continues to appear in the California Department of Justice missing-person database.

The Charley Project also maintains a case profile identifying him as an endangered missing person who disappeared from Sonoma County on April 14, 1979.

A secondary missing-person directory, CaseTrace, lists Matthew under NamUs reference MP122880. That reference is associated with his name, age, and disappearance date, although the underlying NamUs record was not independently retrieved during this research.

Have There Been Any Recent Breakthroughs?

No publicly confirmed recent investigative developments were located in the sources reviewed through October 18, 2026.

Specifically, no verified recent announcement was found concerning a recovered body, positive forensic identification, arrest, criminal charge, confirmed sighting, or new investigative breakthrough.

No publicly documented application of genetic genealogy or newly released age-progression image was located.

This does not establish that law enforcement has stopped investigating. Investigative work can occur without public announcements.

Continuing Public Awareness

Matthew’s disappearance remains documented in the California missing-person system and independent missing-person directories.

His inclusion in these resources helps preserve identifying information and gives the public a way to find the investigating agency.

However, an updated website, recently indexed profile, or newly shared missing-person flyer should not be confused with a new investigative development.

The continued availability of Matthew’s case information is important, but it does not establish that new evidence has emerged.

Possibility of a Cold-Case Review

The Sonoma County Sheriff’s Office identifies missing-person investigations as part of the responsibilities of its Violent Crimes Investigation Unit.

The department also publishes policies addressing long-term missing-person investigations and the use of missing-person identification systems.

Those general policies do not confirm that Matthew’s individual case has undergone a recent review or forensic reassessment.

Conclusion: Remembering Matthew Nolan and the Search for Answers

Matthew Nolan was 21 years old when he disappeared from Sonoma County, California, on April 14, 1979.

More than four decades later, his case remains unresolved, with few details available to explain what happened.

The lack of publicly released information leaves fundamental questions unanswered about his final known movements, the circumstances surrounding his disappearance, and whether anyone encountered him afterward.

Matthew’s disappearance should not be reduced to his medical diagnosis or the passage of time. He was a young man whose life and whereabouts deserve continued attention.

Even after many years, historical photographs, personal records, firsthand recollections, or information from someone who knew him in 1979 could potentially assist investigators.

How to Submit Information

Anyone with information about Matthew Nolan’s disappearance should contact the Sonoma County Sheriff’s Department.

• Case-specific contact listed by California DOJ: 707-565-2994
• Sheriff’s Investigations Division: 707-565-2185
• Sheriff’s non-emergency dispatch: 707-565-2121
• California Missing Persons Hotline: 1-800-222-3463
• Official case number: 3524-25

The Sheriff’s Office also provides an anonymous information submission page for people who may be reluctant to identify themselves.

Anyone providing information should mention Matthew Nolan’s full name and his April 14, 1979, disappearance date.