Overview

• Full name: Jeffrey David Daymude (also spelled Jeffery Daymude)
• Age at disappearance: 23
• Date of birth: September 8, 1955
• Date last seen: October 19, 1978
• Last reported location: Satellite Beach, Brevard County, Florida
• Destination: Minton Park
• Classification: Endangered missing person; suspected foul play
• Investigating agency: Brevard County Sheriff’s Office
• Current status: Unresolved in the publicly available case information
• Key circumstances: Jeffrey disappeared while reportedly driving a dark blue 1964 Chevrolet with his dog. The dog was found three days later in northwest Palm Bay, but Jeffrey’s whereabouts remained unknown.

Detailed Case Breakdown

Jeffrey David Daymude: The Unsolved 1978 Disappearance in Brevard County, Florida

On October 19, 1978, 23-year-old Jeffrey David Daymude disappeared in Brevard County, Florida, while reportedly traveling to Minton Park in a dark blue 1964 Chevrolet. His dog was with him. Three days later, the animal was discovered in northwest Palm Bay, but Jeffrey was nowhere to be found.

Nearly five decades later, his disappearance remains an unresolved mystery. Investigators have suspected foul play, but the publicly available information does not establish what happened to Jeffrey, who may have been responsible, or whether he is deceased.

The case is documented by The Charley Project and has been discussed by missing-person researchers and community advocates.

Case Summary

• Full name: Jeffrey David Daymude (also spelled Jeffery Daymude)
• Age at disappearance: 23
• Date of birth: September 8, 1955
• Date last seen: October 19, 1978
• Last reported location: Satellite Beach, Brevard County, Florida
• Destination: Minton Park
• Classification: Endangered missing person; suspected foul play
• Investigating agency: Brevard County Sheriff’s Office
• Current status: Unresolved in the publicly available case information
• Key circumstances: Jeffrey disappeared while reportedly driving a dark blue 1964 Chevrolet with his dog. The dog was found three days later in northwest Palm Bay, but Jeffrey’s whereabouts remained unknown.

Source: The Charley Project — Jeffrey David Daymude.

Jeffrey Daymude’s Background and Life Before His Disappearance

Jeffrey David Daymude was born on September 8, 1955. Known by the nickname Jeff, he was 23 years old when he vanished in October 1978.

According to his missing-person profile, Jeffrey was approximately 6 feet 2 inches tall and weighed around 160 pounds. He had brown hair and blue eyes. His name also appears with the alternative spelling Jeffery, an important detail when searching historical records.

Jeffrey was associated with Florida’s Brevard County area, including Satellite Beach, where he was reportedly last seen, and Palm Bay, where his dog was subsequently recovered.

Relatively little verified biographical information about Jeffrey’s family, occupation, education, or personal relationships is publicly documented in the sources located for this article. Those gaps should not be filled with assumptions.

What is known is that Jeffrey disappeared at an age when much of his adult life was still ahead of him. His case has remained part of the historical record of Florida’s unresolved missing-person investigations.

October 19, 1978: The Disappearance

On October 19, 1978, Jeffrey was last reported seen in Satellite Beach, Florida. According to The Charley Project, he was traveling toward Minton Park in a dark blue 1964 Chevrolet.

His dog was accompanying him.

The available case summary does not establish Jeffrey’s exact departure time, the reason for his trip, or whether anyone witnessed him arriving at his intended destination.

Those distinctions matter because the reported destination is not necessarily the location where he disappeared.

There is also a geographic discrepancy in secondary listings. While The Charley Project identifies Satellite Beach as his last-seen location, some database-derived listings associate the disappearance with West Melbourne. Both are in Brevard County, but the available information does not establish why the locations differ.

Three Days Later: His Dog Was Found

On approximately October 22, 1978, three days after Jeffrey disappeared, his dog was found in northwest Palm Bay, Florida.

This discovery is one of the most significant publicly documented circumstances in the case.

The dog’s recovery established that the animal had become separated from Jeffrey, but it did not explain how or why that separation occurred.

The publicly accessible case summary does not identify who discovered the dog, its precise recovery location, or whether it showed signs of injury or distress.

Likewise, the available account does not establish what ultimately happened to Jeffrey’s Chevrolet.

Without additional verified investigative records, it would be inappropriate to assume that the vehicle was abandoned, recovered, destroyed, or connected to a crime scene.

The discovery of Jeffrey’s dog remains a central unanswered part of the disappearance.

Investigation History and Available Evidence

Brevard County Sheriff’s Office Investigation

The Brevard County Sheriff’s Office is identified by The Charley Project as the investigating agency.

The case is classified as endangered missing, and the profile states that foul play is suspected.

That assessment is significant, but it is not equivalent to a confirmed homicide determination. No publicly verified evidence located for this article establishes that Jeffrey was murdered.

The publicly available case summaries provide limited information about the original investigative response. They do not document the specific searches conducted, the number of people interviewed, or the forensic methods employed.

Known Evidence and Investigative Details

The following circumstances are supported by the publicly accessible case information:

• Jeffrey was last reported seen on October 19, 1978.
• He was reportedly traveling to Minton Park.
• He was driving a dark blue 1964 Chevrolet.
• His dog was traveling with him.
• The dog was found in northwest Palm Bay three days later.
• Foul play is suspected, but the case remains unresolved.

These facts establish the basic timeline, but they leave major investigative questions unanswered.

Witness Statements and Physical Evidence

No detailed, independently verified witness statements describing Jeffrey’s final movements were located in the publicly available material reviewed.

Similarly, no confirmed public reports were identified describing blood evidence, recovered personal belongings, forensic testing results, or a formally identified crime scene.

This does not mean investigators never obtained such information. Law enforcement agencies may retain evidence and witness accounts that have not been released publicly.

DNA Testing and Genetic Genealogy

Modern DNA analysis and forensic genetic genealogy have helped investigators revisit many historical missing-person and unidentified-remains cases.

However, no publicly confirmed report was located establishing that genetic genealogy produced a lead, that DNA evidence was newly identified, or that unidentified remains were matched to Jeffrey Daymude.

Any suggestion that a forensic breakthrough has occurred would therefore be unsupported.

Suspects, Arrests, and Criminal Proceedings

No officially identified suspect, arrest, criminal charge, or court proceeding directly connected to Jeffrey’s disappearance was verified in the available sources.

Although foul play is suspected, the available record does not support naming any individual as responsible.

Theories and Unresolved Questions

Jeffrey’s disappearance raises several possibilities, but they must be separated from established facts.

Could Jeffrey Have Encountered Foul Play?

The Charley Project specifically reports that foul play is suspected.

This indicates that the possibility of criminal involvement is associated with the case. However, the publicly available summary does not explain the evidence underlying that suspicion.

There is no verified public identification of an attacker, motive, or specific criminal scenario.

What Happened Between Satellite Beach and Palm Bay?

One of the most important unresolved questions concerns the distance and circumstances separating Jeffrey’s reported last-seen location from the place where his dog was discovered.

It is unknown whether Jeffrey traveled to northwest Palm Bay himself, whether the dog wandered there, or whether another person transported the animal.

These are investigative questions, not established theories supported by publicly disclosed evidence.

What Happened to the Chevrolet?

Jeffrey was reportedly driving a dark blue 1964 Chevrolet when he disappeared.

The available case profile does not clarify the vehicle’s subsequent whereabouts.

Knowing whether investigators located the Chevrolet could potentially help establish Jeffrey’s movements, but the absence of that information in public summaries cannot be treated as proof that the vehicle was never recovered.

Could Someone Still Have Information?

Even after decades, people who lived in Brevard County during October 1978 may possess information that was never reported or whose significance was not recognized at the time.

Potentially relevant information could concern Jeffrey’s movements, his vehicle, or the circumstances surrounding the recovery of his dog.

There is no basis for assuming any particular person withheld information. Nevertheless, a historical observation could still be useful if investigators are able to corroborate it.

Latest Publicly Available Investigative Updates — October 2026

A review of publicly accessible case information through October 18, 2026, did not identify a confirmed recent investigative breakthrough in Jeffrey Daymude’s disappearance.

No publicly verified announcement was located documenting an arrest, identification of Jeffrey’s remains, new forensic match, or resolution of the case.

The Charley Project Case Record

The Charley Project maintains a profile for Jeffrey David Daymude. Its published update history identifies March 20, 2013, as the last substantive profile update.

That date refers to an update of the public case summary, not necessarily a new investigative development.

The profile continues to describe Jeffrey as an endangered missing person whose disappearance remains unsolved.

Missing-Person Database References

A secondary case discussion identifies NamUs reference MP17760 and a reported law enforcement reference 78-55701.

The NamUs number is also reproduced in missing-person database listings. However, a current, directly accessible NamUs record confirming the complete case information was not independently retrieved.

The reported sheriff’s case number, 78-55701, likewise could not be independently confirmed from an official agency record and should be treated as a secondary-source reference until verified.

Community Discussions in 2026

A Websleuths discussion about Jeffrey’s disappearance included activity during 2026, including speculation about unidentified remains and possible explanations for his disappearance.

These posts are community discussions, not official investigative findings.

No verified law enforcement announcement was found linking the unidentified remains discussed by forum participants to Jeffrey Daymude. The discussion does not establish that any remains were submitted for comparison or that a match was made.

The presence of recent online discussion should not be confused with a confirmed cold-case breakthrough.

Conclusion: A Florida Disappearance Still Without Answers

Jeffrey David Daymude disappeared on October 19, 1978, while reportedly traveling through Brevard County with his dog.

Three days later, the dog was found in northwest Palm Bay. Jeffrey was not.

The circumstances have raised suspicions of foul play, but publicly available information has not established what happened to him.

His disappearance remains an important unresolved case, not only because of the unanswered questions surrounding his final movements but also because of the possibility that someone may still remember a detail from October 1978.

Anyone with credible information about Jeffrey’s disappearance, his dark blue 1964 Chevrolet, or the circumstances surrounding the recovery of his dog is encouraged to contact the Brevard County Sheriff’s Office.

The sheriff’s office currently lists 321-264-5100 as its non-emergency contact number.

Information can also be directed to the Florida Department of Law Enforcement’s Missing Endangered Persons Information Clearinghouse at 1-888-356-4774.

Even after decades, a previously unreported observation or newly discovered record could help investigators reconstruct the events surrounding Jeffrey’s disappearance.

Jeffrey Daymude’s case deserves continued attention, careful documentation, and a resolution grounded in verifiable evidence.