Overview

• Full name: Jeffrey Stewart Christian Immel
• Also known as: Christian Immel
• Age at disappearance: 33
• Date of birth: November 11, 1955
• Date last seen: February 8, 1989
• Last known location: Alameda, California, sailing toward San Francisco Bay
• City: Alameda
• County: Alameda County
• State: California
• Case classification: Missing person; described as lost/injured missing in secondary case coverage
• Current status: Unresolved; listed as missing by the California Department of Justice
• Investigating agency: Alameda Police Department
• Police case number: 8901726

Main circumstances: Jeffrey was last seen aboard his boat heading toward San Francisco Bay. On February 9, 1989, the vessel was discovered submerged in the middle of the bay. Jeffrey was not located, and the publicly available record does not establish what happened to him.

Detailed Case Breakdown

Jeffrey Stewart Christian Immel: The Unsolved 1989 Disappearance in San Francisco Bay, California

On February 8, 1989, 33-year-old Jeffrey Stewart Christian Immel disappeared while sailing toward San Francisco Bay in California. The following day, his boat was discovered submerged in the bay, but Jeffrey was nowhere to be found.

More than 37 years later, his disappearance remains unresolved in publicly available missing-person records. Although an accidental drowning has been suggested as a possible explanation, there is no publicly verified confirmation of his death or recovery of his remains.

Jeffrey’s case is documented by the California Department of Justice, which continues to publish his missing-person information and identifies the Alameda Police Department as the reporting agency.

Case Summary

• Full name: Jeffrey Stewart Christian Immel
• Also known as: Christian Immel
• Age at disappearance: 33
• Date of birth: November 11, 1955
• Date last seen: February 8, 1989
• Last known location: Alameda, California, sailing toward San Francisco Bay
• City: Alameda
• County: Alameda County
• State: California
• Case classification: Missing person; described as lost/injured missing in secondary case coverage
• Current status: Unresolved; listed as missing by the California Department of Justice
• Investigating agency: Alameda Police Department
• Police case number: 8901726

Main circumstances: Jeffrey was last seen aboard his boat heading toward San Francisco Bay. On February 9, 1989, the vessel was discovered submerged in the middle of the bay. Jeffrey was not located, and the publicly available record does not establish what happened to him.

Sources: California Department of Justice and Websleuths case discussion.

Background: Who Was Jeffrey Stewart Christian Immel?

Jeffrey Stewart Christian Immel was born on November 11, 1955. He was 33 years old when he disappeared in February 1989.

Official records identify him as a white male with brown hair and blue eyes. At the time of his disappearance, he was approximately 5 feet 8 inches tall and weighed 145 pounds.

The California Department of Justice documents several distinguishing characteristics that could be important in identifying him:

• A horizontal scar across his left wrist.
• A scar on his right knee.
• Eyeglasses.
• A Timex watch worn on his left wrist.

Dental X-rays were also listed as available, potentially providing an identification resource if unidentified remains were ever considered for comparison.

Jeffrey was also known as Christian Immel, an alternate name that may be important when reviewing historical records or information submitted by members of the public.

Little verified biographical information about Jeffrey’s employment, family relationships, education, or personal life appears in the publicly accessible sources examined for this article. Rather than speculate about those details, the known record centers on his disappearance and the discovery of his boat.

Source: California DOJ missing-person profile.

February 8, 1989: Jeffrey’s Disappearance

On Wednesday, February 8, 1989, Jeffrey was last seen sailing his boat from the Alameda area toward San Francisco Bay.

The California Department of Justice confirms that Jeffrey was last seen aboard the vessel, but its public case description provides few additional details about his departure.

It does not establish the precise time he set sail, his intended destination, the type of boat, or whether anyone was expected to meet him.

Those missing details matter because they limit what can reliably be reconstructed about his final known movements.

February 9, 1989: The Submerged Boat

The following day, February 9, Jeffrey’s boat was discovered submerged in the middle of San Francisco Bay.

The discovery was the most significant publicly documented physical development in the case.

The vessel’s condition raised the possibility that Jeffrey had experienced an emergency on the water. However, the publicly available California Department of Justice record does not explain why the boat sank or what happened to its occupant.

A secondary case account reports that Jeffrey was not found at the scene.

There is no verified public description of damage to the boat, weather conditions at the time, mechanical problems, or other evidence establishing the cause of the sinking.

The discovery of the vessel therefore supports the possibility of a boating accident, but it does not establish Jeffrey’s fate.

Sources: California Department of Justice and Websleuths case discussion.

Investigation History and Available Evidence

The Alameda Police Department Investigation

The Alameda Police Department is identified by the California Department of Justice as the agency responsible for Jeffrey’s missing-person report.

The official record lists police case number 8901726.

The available case information establishes the central sequence of events: Jeffrey disappeared on February 8, 1989, and his boat was discovered submerged the next day.

However, the publicly accessible sources reviewed do not provide a comprehensive investigative chronology.

They do not confirm the extent of any water searches, the agencies that may have participated, the techniques used, or the results of any examination of the recovered vessel.

This lack of published detail should not be interpreted as proof that such investigative work did not occur. It means those activities could not be independently verified from the sources available.

Physical and Identification Evidence

The principal physical evidence described in the public record is Jeffrey’s submerged boat.

The California Department of Justice also maintains descriptive information that could assist with identification, including his scars, physical appearance, and the availability of dental X-rays.

No publicly confirmed forensic results connecting Jeffrey to recovered remains were located.

Likewise, no verified public report was found establishing that DNA testing, forensic genetic genealogy, or a new examination of the vessel had produced an investigative breakthrough.

Witnesses and Persons of Interest

The official missing-person profile confirms that Jeffrey was last seen sailing toward the bay, but it does not identify the individual or individuals who last observed him.

No publicly verified suspect or person of interest was identified in the sources reviewed.

There is also no reliable public evidence establishing an assault, abduction, or deliberate act of violence in connection with his disappearance.

Jeffrey’s case should therefore continue to be described as a missing-person investigation rather than a confirmed homicide.

Source: California Department of Justice case record.

Theories and Unresolved Questions

Could Jeffrey Have Drowned?

One possible explanation is that Jeffrey experienced a boating emergency and drowned.

A November 19, 2025, Websleuths discussion, summarizing established missing-person information, describes the case as lost/injured missing and reports that drowning is believed to be a possibility.

This is an investigative explanation discussed in secondary case coverage, not a confirmed determination of Jeffrey’s cause of death.

The boat’s discovery beneath the water makes an accident a reasonable possibility to examine. Nevertheless, without confirmed evidence of what caused the vessel to sink or what happened afterward, the circumstances remain unresolved.

Source: Websleuths case discussion.

Other Possibilities

It is not possible to determine from the published evidence whether Jeffrey entered the water accidentally, experienced a medical emergency, encountered an unexpected problem aboard the vessel, or survived the initial incident.

These are general possibilities, not verified investigative findings.

There is no credible public evidence identified in this research to support naming a perpetrator, alleging foul play, or assigning a specific motive.

Questions That Remain Unanswered

Several important questions remain unresolved in the accessible record:

• What caused Jeffrey’s boat to become submerged?
• What were the weather and water conditions during his final voyage?
• Who last saw Jeffrey, and what did that person observe?
• Was any emergency equipment or personal property recovered?
• What searches were conducted after the boat was discovered?
• Were any forensic examinations performed on the vessel?
• Have investigators compared Jeffrey’s dental records or other identifiers with unidentified remains?

These questions highlight gaps in the publicly available documentation. They should not be interpreted as evidence that investigators failed to examine them.

Latest Publicly Available Investigative Updates

California’s Continuing Missing-Person Listing

As of October 25, 2026, Jeffrey remains listed in the California Department of Justice’s publicly accessible missing-person records.

His official profile continues to identify the Alameda Police Department as the reporting agency and retains the original February 8, 1989, disappearance date.

This is evidence of his continuing public missing-person listing, not proof that a new investigation or forensic review has recently taken place.

November 19, 2025: Renewed Online Discussion

On November 19, 2025, a Websleuths user opened a discussion dedicated to Jeffrey’s disappearance.

The discussion reproduced identifying information and the known circumstances involving his boat.

Although the thread provides an additional opportunity for public awareness, it does not establish a new witness, recovered evidence, or an official investigative development.

The thread should therefore be treated as community discussion rather than a law enforcement announcement.

No Verified Recent Breakthrough

No publicly confirmed recent investigative developments were located as of October 25, 2026.

Specifically, the sources examined did not establish a recent arrest, criminal charge, identification of remains, DNA breakthrough, or official resolution of Jeffrey’s disappearance.

No verified public announcement of a new search or formal cold-case review was identified.

The absence of such announcements does not necessarily mean the case is inactive. Investigative work may occur without public disclosure.

Conclusion: Remembering Jeffrey Immel and the Search for Answers

Jeffrey Stewart Christian Immel disappeared on February 8, 1989, during what is publicly documented as a boating trip toward San Francisco Bay.

The discovery of his submerged boat the following day remains the defining event in his disappearance.

Despite the passage of more than three decades, the publicly available record does not establish exactly what happened to him.

The possibility of accidental drowning has been discussed, but the available evidence does not confirm his death or explain the circumstances that led to the boat sinking.

Jeffrey remains more than a name in a missing-person database. His case represents an unanswered question about a man’s final known journey and the circumstances that followed.

Anyone with firsthand information about Jeffrey, his boating activities in February 1989, the discovery of his vessel, or other relevant circumstances is encouraged to contact the Alameda Police Department at (510) 748-4508, the number published in his California Department of Justice case profile.

When providing information, reference case number 8901726.

Even information that seems minor may be worth sharing directly with investigators, who are best positioned to determine whether it is relevant.

Source: California Department of Justice.