Overview

• Full name: Robert Canon
• Age when last seen: 52
• Date last seen: October 9, 2011
• Last known location: Pleasanton, California
• City: Pleasanton
• County: Alameda County
• State: California
• Case classification: Missing person
• Current case status: Unresolved in available public missing-person listings; current law enforcement status not independently confirmed
• NamUs reference: 90075, as reported by secondary missing-person listings
• Physical description: White male, approximately 6 feet tall and 170 pounds, with gray or partially gray hair and blue eyes
• Circumstances: Canon was reported last seen in Pleasanton on October 9, 2011. The publicly accessible records reviewed do not establish what he was doing immediately before he disappeared or what may have happened afterward.

Detailed Case Breakdown

Robert Canon Missing Since October 2011 in Pleasanton, California: An Unresolved Disappearance

Robert Canon was 52 years old when he was reported last seen in Pleasanton, California, on October 9, 2011. His disappearance remains documented in publicly accessible missing-person listings more than 15 years later, but few details about the circumstances surrounding his disappearance have been made publicly available.

The absence of a detailed public account leaves important questions unanswered, including where Canon was last observed, what happened afterward, and whether investigators have uncovered evidence explaining his disappearance.

His case should be treated as a missing-person investigation, not a confirmed homicide. The available records do not establish that he was murdered or that criminal activity caused his disappearance.

Case Summary

• Full name: Robert Canon
• Age when last seen: 52
• Date last seen: October 9, 2011
• Last known location: Pleasanton, California
• City: Pleasanton
• County: Alameda County
• State: California
• Case classification: Missing person
• Current case status: Unresolved in available public missing-person listings; current law enforcement status not independently confirmed
• NamUs reference: 90075, as reported by secondary missing-person listings
• Physical description: White male, approximately 6 feet tall and 170 pounds, with gray or partially gray hair and blue eyes
• Circumstances: Canon was reported last seen in Pleasanton on October 9, 2011. The publicly accessible records reviewed do not establish what he was doing immediately before he disappeared or what may have happened afterward.

Background: Who Was Robert Canon?

Robert Canon was a 52-year-old man whose disappearance became associated with Pleasanton, a city in Alameda County in Northern California’s East Bay region.

Public missing-person listings identify Canon as a white male with blue eyes and gray or partially gray hair. His recorded height was approximately 6 feet, and his weight was approximately 170 pounds. These details may help individuals recognize him or recall a possible encounter around the time he disappeared.

However, independently verified biographical information about Canon is limited. The available records do not establish his occupation, family relationships, living arrangements, or personal history.

There is also insufficient verified information to describe his normal daily routine, the circumstances of his personal life, or whether he had previously disappeared.

Those details matter because they could help establish whether anything about October 9, 2011, was unusual. Without reliable reporting or official investigative documentation, however, assumptions about Canon’s personal circumstances would be inappropriate.

The Disappearance on October 9, 2011

The central documented fact in Robert Canon’s case is his last-seen date: October 9, 2011.

Missing-person databases identify Pleasanton, California, as the location associated with his disappearance. However, they do not provide a sufficiently detailed account of his final confirmed movements.

The publicly available information reviewed does not establish whether Canon was last observed at a residence, workplace, business, public location, or while traveling.

Similarly, there is no independently verified account establishing whether he was walking, driving, meeting someone, or carrying personal belongings when he was last seen.

The available records also do not identify a confirmed final witness or provide a verified account of Canon’s last communication.

These omissions are significant. In a missing-person investigation, a person’s final confirmed location and activities can help investigators reconstruct a timeline, identify potential witnesses, and determine where searches should begin.

In Canon’s case, the limited public record makes it difficult to reconstruct the events immediately preceding his disappearance.

Investigation History and Available Evidence

Missing-person records

Robert Canon’s disappearance appears in missing-person information services that identify October 9, 2011, as his last-seen date.

The records reviewed associate him with the reference number 90075. CaseTrace identifies this as a NamUs case reference, while SpotCrime displays the identifier MP90075.

These secondary-source references appear to concern the same missing-person record, but they should not be mistaken for an independently verified local police report number.

The available information does not establish when Canon was first reported missing, which law enforcement agency initially accepted the report, or whether jurisdiction was later transferred.

Searches and investigative activity

No reliable, case-specific public account of an organized search for Canon was located in the reviewed material.

Consequently, it cannot be confirmed whether investigators conducted ground searches, aerial searches, neighborhood canvasses, interviews, or examinations of specific properties.

This lack of publicly available documentation does not establish that searches or investigative work never occurred. It means those activities could not be independently verified.

Physical and forensic evidence

No publicly confirmed evidence inventory was located for Canon’s disappearance.

In particular, the reviewed sources do not establish the discovery of an abandoned vehicle, recovered personal belongings, surveillance footage, or other physical evidence directly connected to his disappearance.

There is also no verified case-specific public announcement establishing that DNA testing, forensic genetic genealogy, or comparisons with unidentified human remains have produced a result in his case.

California’s missing-person system supports comparisons involving identifying characteristics and forensic information, including DNA. However, the existence of those statewide capabilities does not establish that a particular technique was used in Canon’s investigation.

Witnesses, suspects, and persons of interest

No officially identified suspect or person of interest could be verified from the reviewed sources.

Likewise, no reliable case-specific public witness statement was located that establishes a confrontation, suspicious encounter, or other event immediately before Canon disappeared.

There is no verified public information establishing an arrest, criminal charge, or prosecution connected to his disappearance.

Theories and Unresolved Questions

Because the circumstances of Robert Canon’s disappearance have not been publicly established in detail, it is important to distinguish unanswered questions from investigative conclusions.

Could Canon have left voluntarily?

A voluntary departure is one possible explanation in some missing-person investigations, but no verified evidence was located establishing that Canon intended to leave Pleasanton or deliberately end contact with people who knew him.

Without reliable information about his personal circumstances or final movements, voluntary disappearance cannot be presented as an established explanation.

Could an accident or medical emergency have occurred?

Accidents, medical emergencies, and disorientation can sometimes explain why a missing person fails to return.

However, no verified information establishes that Canon had a medical condition, suffered an accident, or encountered a particular environmental hazard.

These remain general possibilities rather than case-specific findings.

Was foul play involved?

The possibility of criminal involvement cannot be determined from the limited public record.

No official finding of homicide, confirmed crime scene, identified perpetrator, or documented evidence of an assault was located in the reviewed sources.

It would therefore be misleading to characterize Canon’s disappearance as a murder investigation or to suggest that foul play has been established.

Questions that remain unanswered

Several fundamental questions remain unresolved in the publicly accessible account:

• Where exactly was Robert Canon last seen on October 9, 2011?
• Who last had confirmed contact with him?
• When was he reported missing, and which agency received the initial report?
• Were searches conducted, and did they produce any evidence?
• Have investigators received credible sightings or leads since 2011?
• Has his case undergone a recent review or forensic reassessment?

Answers to these questions could substantially clarify the circumstances of his disappearance.

Latest Publicly Available Investigative Updates

Research reviewed through October 27, 2026

No publicly confirmed recent investigative developments were located concerning Robert Canon’s disappearance.

The missing-person listings reviewed continue to associate Canon with Pleasanton and the October 9, 2011, last-seen date. Their continued availability should not be interpreted as proof of a recent investigative breakthrough or as an official confirmation of his present case status.

No independently verified recent announcement was located concerning newly recovered remains, a confirmed identification, an arrest, criminal charges, a DNA match, or a resolution of his disappearance.

Likewise, no verified recent law enforcement statement was found announcing a renewed search, newly identified witness, or public appeal involving specific evidence.

The available records are insufficient to determine whether investigators have continued working on the case privately, received confidential tips, or conducted investigative reviews that have not been publicized.

The latest verifiable public information therefore supports describing Robert Canon’s disappearance as unresolved in accessible missing-person records, without claiming a newly confirmed investigative development.

Conclusion: The Search for Answers About Robert Canon

Robert Canon was 52 years old when he was last reported seen in Pleasanton, California, on October 9, 2011.

More than 15 years later, the publicly available account remains limited. His final confirmed activities, the circumstances that led to his disappearance, and his subsequent whereabouts have not been established in the sources reviewed.

The absence of public investigative details makes responsible reporting particularly important. Speculation about criminal activity, personal relationships, or possible motives should not be substituted for evidence.

Anyone with firsthand information about Canon’s whereabouts on or around October 9, 2011, or with credible information that could help establish what happened afterward, is encouraged to contact law enforcement.

Information can also be directed through the California Department of Justice’s missing-person assistance hotline at 1-800-222-3463.

Even after many years, reliable information about a missing person’s last known movements may help investigators clarify a case. Robert Canon’s disappearance deserves continued attention grounded in verified facts and respect for everyone affected.