“Mr & Mrs Murder”: 20/20 Reports on Mike Williams Homicide September 18 2026

ABC’s 20/20 returns with an all-new two-hour true-crime report, “Mr & Mrs Murder,” airing Friday, September 18, 2026, at 9/8c on ABC. The episode examines the killing of Jerry Michael “Mike” Williams, a 31-year-old Florida husband and father whose disappearance during what appeared to be a duck-hunting trip created a mystery that lasted for 17 years. 20/20 airs Fridays at 9/8c, with episodes also available for streaming through ABC and Hulu.

At first, the explanation for Williams’ disappearance seemed tragic but straightforward: he had gone alone to Lake Seminole, fallen from his boat and drowned. His body had vanished, perhaps consumed by alligators. The truth established by investigators years later was different. Williams had been lured onto the lake by his close friend Brian Winchester, pushed into the water and shot after the attempt to make his death look like a boating accident failed. The case exposed an affair between Winchester and Williams’ wife, Denise, an insurance payout and a conspiracy that remained concealed for years.

20/20 Revisits the Mystery Behind “Mr & Mrs Murder”

The title “Mr & Mrs Murder” reflects the relationship at the center of the investigation. Mike Williams and Brian Winchester had been close friends. Their families socialized together, but Winchester was also having an affair with Mike’s wife. According to the evidence presented in court, Winchester and Denise began their affair in 1997 and later discussed ways they could remove Mike from their lives. Florida’s First District Court of Appeal found that there was sufficient evidence of an agreement between Denise and Winchester to kill Mike, even though the court later reached a different conclusion about Denise’s legal responsibility as a principal to the murder itself.

The case is striking because the conspiracy did not come to light through evidence collected at the original scene. The first investigation treated Williams as a missing hunter and presumed drowning victim. By the time authorities came to suspect homicide, evidence that might have answered key questions had disappeared. Solving the case required investigators to wait for the relationships among those involved to fracture.

Who Was Mike Williams?

Jerry Michael “Mike” Williams was born on October 16, 1969, and grew up near Tallahassee. He attended North Florida Christian High School, where he became involved in student government, football and other activities. He later attended Florida State University and built a career as a real estate appraiser.

Williams married his high school sweetheart, Denise Merrell, in 1994. Their daughter was born in 1999. By 2000, Williams had built a successful career, owned a home with his family and maintained a circle of friends that included Brian Winchester.

Hunting was also part of Williams’ life. He had been duck hunting since his teenage years and knew the waterways and hazards associated with the activity. That experience would become important once friends, relatives and investigators began questioning whether the circumstances presented as a hunting accident made sense.

The Secret Relationship Between Denise Williams and Brian Winchester

Mike, Denise, Brian Winchester and Winchester’s then-wife Kathy belonged to the same social circle. Behind those friendships, Brian and Denise had begun an affair. The appellate record states that their friendship developed into a romantic relationship in 1997 and that they began seeing each other on a regular basis.

Winchester later testified that he and Denise discussed ways they could be together. Prosecutors presented evidence that plans were considered and rejected before the pair settled on making Mike’s death appear to be a hunting accident. Winchester described the planning as mutual, while also acknowledging that he instigated much of it. That distinction became important during Denise’s appeal because conspiracy and liability as a principal to murder required the courts to consider different elements.

Life Insurance Adds Another Element to the Case

Months before Williams disappeared, substantial life insurance coverage was taken out on him. Brian Winchester worked in insurance and sold Mike policies before his death. Denise later collected about $1.5 million after Mike was declared legally dead.

The insurance became one part of the prosecution’s account of the conspiracy. It also became an important feature of the suspicions surrounding the case as investigators reconsidered whether the disappearance had been staged. The appellate court noted evidence concerning the insurance but later ruled that maintaining the policy did not establish the conduct required to convict Denise as a principal to the murder itself.

The insurance money did not create the initial homicide investigation. For years, there was no proven homicide. Mike was legally considered the victim of an accidental drowning, and Denise was able to collect the policies under that understanding.

Mike Williams Vanishes on December 16, 2000

On Saturday, December 16, 2000, Williams was expected to go duck hunting at Lake Seminole, a large reservoir along the Florida-Georgia border. The date was also Mike and Denise’s sixth wedding anniversary, and the couple had plans for later that day.

When Mike failed to return, concern grew. His Ford Bronco was found near a boat launch, and a search of the lake began. His boat was discovered without him. His shotgun remained in its case.

There was no body.

That absence became the central mystery of the case. Searchers worked the area where investigators believed Williams might have gone into the water, but they found no remains that established a drowning.

Investigators Initially Believe Mike Drowned

The first theory was that Williams had struck a submerged stump, fallen from the boat and drowned. Lake Seminole contained submerged trees, vegetation and other hazards capable of creating problems for boaters.

Investigators considered the possibility that Williams had been wearing chest waders when he entered the water. The theory held that the waders filled with water, leaving him unable to reach safety.

The problem was that Williams did not surface. In other drowning cases, investigators expected a body to rise after decomposition produced enough gas to bring it toward the surface. Days passed. Then weeks passed.

Williams remained missing.

The Alligator Explanation Begins to Take Hold

One explanation offered for the missing remains was that alligators had consumed Williams’ body. Lake Seminole had a substantial alligator population, making the idea sound possible to people unfamiliar with the animals’ winter behavior.

The theory helped explain something that otherwise appeared difficult to understand: how a full-grown man could drown in a lake under extensive search and leave no body.

There was a major problem. December temperatures were too cold for the theory to fit normal alligator behavior. As the case received more scrutiny, experts noted that alligators become less active as temperatures fall and feed little during cold periods. The prospect that alligators had consumed an entire human body during winter, leaving no recoverable remains, became difficult to sustain.

Hunting Gear Appears Months After Mike Vanishes

About six months after Williams disappeared, a pair of waders was found floating in the lake. Divers also recovered a hunting jacket and flashlight. The jacket contained a hunting license bearing Williams’ name.

The discovery appeared to support the drowning theory, but the condition of the objects generated new questions. The waders did not display the damage that might have been expected if alligators had attacked a person wearing them. The recovered objects also appeared inconsistent with equipment that had spent months submerged.

Nevertheless, the discoveries were used as part of the basis for declaring Williams legally dead. Denise could then collect the life insurance proceeds.

The mystery appeared to have reached an ending without the recovery of Mike himself.

Mike’s Mother Refuses to Accept the Drowning Story

One person refused to allow the case to disappear: Mike’s mother, Cheryl Williams.

Cheryl did not believe her son had drowned and been consumed by alligators. She continued asking questions, contacted authorities, placed advertisements, distributed information about Mike and pressed Florida officials to investigate.

Her campaign lasted years. She pursued the case when there was no body, no confirmed crime scene and no public evidence establishing that her son had been murdered.

Her persistence also helped keep attention on an important statistical anomaly. Other people had drowned in Lake Seminole, yet Mike’s presumed drowning had produced no body.

Investigators Begin Finding Problems With the Accident Theory

The Florida Department of Law Enforcement reopened the case in 2004. By then, several aspects of the original account had drawn scrutiny.

There were questions about the location where Mike’s vehicle was found, the behavior of his boat and whether he would have been wearing his waders while operating it. Friends described him as safety-conscious and familiar with the risks of wearing waders while traveling across the water.

Investigators also faced the consequences of the original case having been treated as an accident. The lakeshore had not been protected as a homicide scene. Vehicles and equipment had been returned. Searchers had moved through the area. Potential evidence had been lost.

Authorities could become suspicious, but suspicion alone could not establish a murder.

Denise Williams Marries Mike’s Best Friend

The circumstances became more striking when Denise and Brian Winchester formed a public relationship. Brian divorced his first wife, and in 2005 he married Denise.

The man who had been one of Mike’s close friends, and who had sold him life insurance, was now married to Mike’s widow.

That fact intensified public interest but did not establish criminal responsibility. Investigators still lacked the evidence needed to prove that Mike had been murdered, much less who had killed him.

For years, the case remained trapped at that point.

Denise and Brian Winchester’s Marriage Falls Apart

The relationship that had survived Mike’s disappearance did not last. Denise and Brian separated in 2012, and Denise filed for divorce in 2015.

Their deteriorating marriage would create the event that changed the Williams investigation.

Winchester became concerned about the divorce and, according to evidence developed by authorities, feared what Denise might reveal. In August 2016, he hid in Denise’s vehicle as she prepared to drive to work.

He was armed.

Brian Winchester Kidnaps Denise at Gunpoint

Denise told investigators that Winchester emerged from the back of her vehicle and began directing her while holding a gun. She managed to drive into the parking lot of a CVS rather than follow his instructions.

Winchester told Denise that he intended to kill himself and did not want their marriage to end. Denise eventually returned him to his vehicle and then reported the incident to police.

Authorities charged Winchester in connection with the abduction. The case had no apparent direct connection to Mike Williams’ disappearance, but it placed a person central to the old mystery under criminal pressure.

A court later sentenced Winchester to 20 years in prison followed by 15 years of probation for the kidnapping case. The appellate record confirms that Winchester entered a cooperation agreement while the kidnapping prosecution was pending.

Winchester Finally Tells Investigators What Happened to Mike

Facing the consequences of the kidnapping case, Winchester began cooperating with authorities.

Under the agreement described by the appellate court, prosecutors agreed not to recommend a life sentence in the kidnapping case, not to raise alleged witness tampering at sentencing and not to use Winchester’s truthful testimony against him in future proceedings. Winchester then admitted that he had killed Mike and implicated Denise in the conspiracy.

For the first time since December 2000, investigators had an account explaining why Mike’s body had never been found in Lake Seminole.

It was because he had never been left there.

The Plan Was to Make Mike’s Death Look Like a Hunting Accident

According to Winchester’s testimony, he arranged to go hunting with Mike on December 16, 2000. Mike believed he was spending the morning with a trusted friend.

Winchester’s plan was to kill him while making the death appear accidental. He got Mike onto Lake Seminole and attempted to create the drowning scenario that investigators would later accept.

Winchester testified that he got Mike to put on his waders and pushed him into the water. The expectation was that Mike would drown.

Mike survived the fall.

Mike Reaches a Stump and the Plan Begins to Fail

Instead of sinking beneath the lake, Mike managed to reach a tree stump and hold on.

That changed the situation for Winchester. The staged accident was no longer working. If Mike climbed out of the water, he could return home and tell police what his friend had done.

Winchester testified that he shot Mike in the face with a shotgun.

The account transformed details that had puzzled investigators for years. The abandoned boat had not marked the location of an accidental drowning. It had been part of an attempt to create one.

Winchester Removes Mike’s Body From Lake Seminole

Once Mike had been shot, Winchester could no longer leave the scene as planned. A gunshot wound would expose the death as a homicide if the body were recovered from the lake.

Winchester removed Mike’s body and transported it away from Lake Seminole.

He buried the remains in a remote area near Tallahassee. Mike’s body remained there while investigators, volunteers, relatives and friends searched Lake Seminole for a man who was no longer at the lake.

Winchester then returned to his life. The staged disappearance began producing the intended result: investigators concentrated on an apparent boating accident.

The Affair Remains Hidden While Mike Is Declared Dead

The conspiracy depended on the accident story surviving scrutiny.

Denise obtained a declaration of death after the hunting equipment was recovered. Life insurance claims followed. Years later, she and Winchester married.

According to the evidence presented at Denise’s trial, the affair had begun years before Mike died. Winchester told the jury that he and Denise had considered different ways of removing Mike before the hunting scenario was selected.

The state argued that the murder allowed Denise and Winchester to pursue the life they wanted without divorce while also creating access to insurance proceeds.

Investigators Recover Mike Williams’ Remains

Winchester gave investigators information that led them to the location where Mike had been buried.

The recovery operation took place in 2017. Investigators searched a difficult area near Tallahassee and recovered most of Mike’s skeleton along with preserved pieces of clothing. DNA testing connected the remains to his family.

After almost 17 years, authorities could establish something Mike’s mother had argued for years: he had not drowned at Lake Seminole.

He had been murdered.

The Recovery Turns a Missing-Person Mystery Into a Murder Case

The discovery altered the legal landscape. Investigators now possessed a victim’s remains, an admitted killer, an account of the crime and evidence concerning a conspiracy.

The Florida Department of Law Enforcement announced in December 2017 that Mike’s remains had been recovered and that his death was a homicide. Authorities withheld important details while their investigation continued.

The announcement ended one mystery but created another question for prosecutors: what criminal case could they establish against Denise?

Denise Williams Is Arrested

On May 8, 2018, Denise Williams was arrested after a grand jury indicted her.

She faced charges of first-degree murder, conspiracy to commit first-degree murder and accessory after the fact. She pleaded not guilty.

The prosecution’s case depended in large part on Winchester. That created an unusual courtroom situation. The man who admitted pulling the trigger was not the defendant on trial for Mike’s murder.

Winchester became the state’s central witness against Denise.

Brian Winchester Testifies Against Denise

At Denise’s December 2018 trial, Winchester described the affair, discussions about killing Mike, the attempt to drown him and the shooting.

He testified about the relationship he and Denise had maintained while each was married to someone else. Prosecutors argued that the pair had agreed to eliminate Mike so they could eventually be together.

The defense attacked Winchester’s credibility and emphasized the benefits he received for cooperating. Denise’s attorneys argued that there was no physical evidence placing her at Lake Seminole and that Winchester was the person who planned and carried out the killing.

That distinction would become critical on appeal.

Secret Recordings Add to the Prosecution’s Case

Investigators also obtained recorded conversations involving Denise.

Brian’s former wife, Kathy, cooperated with authorities and confronted Denise with allegations about the killing. Prosecutors argued that Denise’s responses supported their claim that she knew about the conspiracy.

The recordings did not contain a simple confession from Denise. Their significance rested on how prosecutors said she responded when confronted with details of the crime and what she appeared concerned that Winchester might have disclosed.

Combined with Winchester’s testimony and evidence surrounding the relationship, the recordings helped prosecutors construct their conspiracy case.

The Jury Convicts Denise Williams

After the December 2018 trial, jurors returned guilty verdicts.

Denise was found guilty of first-degree murder, conspiracy to commit first-degree murder and accessory after the fact. The trial court later dismissed the accessory conviction because of the legal conflict involved in treating the same defendant as both a principal to a murder and an accessory after it. The appellate decision explains that Denise ultimately stood convicted and sentenced on the murder and conspiracy counts after the accessory count was dismissed.

In February 2019, Denise received a life sentence for murder, along with a 30-year sentence for conspiracy.

For Mike’s family, the verdict appeared to provide a legal conclusion to a case that had begun more than 18 years before.

It did not prove to be the final result.

Denise Williams Appeals Her Murder Conviction

Denise challenged the convictions before Florida’s First District Court of Appeal.

Her lawyers argued, among other issues, that the evidence did not establish the legal requirements necessary to convict her as a principal to first-degree murder. The question was narrower than whether she had agreed with Winchester that Mike should be killed.

Under Florida law, a conspiracy conviction could rest on proof of an agreement and criminal intent. Convicting Denise as a principal to the completed murder required proof satisfying a different legal standard.

The appellate court found that distinction decisive.

The First-Degree Murder Conviction Is Overturned

In November 2020, the First District Court of Appeal reversed Denise’s first-degree murder conviction. A substituted opinion issued in March 2021 maintained that result.

The court did not find that no conspiracy existed. Instead, it concluded that the state had failed to establish the elements required to convict Denise as a principal to Winchester’s murder of Mike.

The appellate court found no evidence of acts or words by Denise that satisfied the statutory requirements for aiding, abetting, counseling, hiring or procuring Winchester’s commission of the murder itself. The court noted evidence that Winchester initiated much of the planning and executed the scheme.

As a result, Denise’s murder conviction and life sentence could not stand.

The Conspiracy Conviction Remains in Place

The same appellate court reached the opposite conclusion on the conspiracy charge.

It found sufficient evidence that Denise and Winchester had an agreement to kill Mike and that Denise intended for Winchester to kill him. The court therefore upheld her conviction for conspiracy to commit murder.

That distinction explains the unusual status of the case. Denise was no longer legally convicted of Mike’s first-degree murder, but she remained convicted of conspiring to bring about his death.

Her 30-year prison sentence for conspiracy remained intact.

The State Tries to Restore the Murder Conviction

Florida sought further review after the appellate decision.

The effort did not restore Denise’s murder conviction. The appellate ruling reversing that conviction remained in effect, leaving conspiracy to commit murder as the central surviving conviction related to Mike’s death.

This means descriptions stating that Denise remains convicted of Mike’s murder can be misleading. A jury did convict her of first-degree murder in 2018, but that conviction was overturned on appeal. Her conspiracy conviction survived.

What Happened to Brian Winchester?

Winchester occupies an unusual position in the final legal history of the case.

He admitted that he was the person who pushed Mike into Lake Seminole and shot him when the attempted drowning failed. He then concealed Mike’s body and maintained the secret for years.

Yet Winchester’s cooperation agreement protected him in connection with the Williams homicide. His imprisonment resulted from the separate 2016 crime against Denise.

The court record states that he received 20 years in prison followed by 15 years of probation for that kidnapping case.

His confession nevertheless became the key that solved the Williams case. Without it, authorities might never have known where Mike was buried or obtained the testimony necessary to prosecute the conspiracy.

Why No One Is Serving a Sentence for Mike’s Murder Itself

The final outcome contains a legal paradox.

Brian Winchester admitted killing Mike but received protection connected to his cooperation. Denise was convicted by a jury of first-degree murder but later had that conviction reversed because the appellate court found the evidence legally insufficient to establish that she was a principal to the killing.

Denise remains imprisoned because the evidence was sufficient to sustain the separate conspiracy conviction. Winchester remains imprisoned for the kidnapping of Denise.

The result is that Mike Williams is an established homicide victim, the man who admitted shooting him helped authorities recover his remains, and a court upheld the finding that Denise conspired with Winchester to kill him, yet neither is serving a sentence for a surviving conviction of Mike’s murder itself.

A Mother’s Campaign Helped Keep the Case Alive

The case might have remained classified as an accidental drowning without Cheryl Williams’ refusal to abandon her questions.

For years, she challenged the explanation that her son had simply disappeared beneath Lake Seminole. She distributed flyers, bought advertisements, contacted officials and sought new investigations.

Her position was vindicated on the central factual question. Mike had not drowned. His remains had not been consumed by alligators. His disappearance had been staged to create that conclusion.

The eventual recovery of his remains gave his family an answer that the original Lake Seminole search could not provide.

The Case Exposed the Cost of the Original Accident Theory

The Williams investigation also illustrates how an incorrect initial assumption can shape a case for years.

Because authorities approached Lake Seminole as the site of a missing-hunter accident rather than a possible homicide, investigators did not preserve the area in the way they would have preserved a suspected murder scene. Potential evidence was returned, disturbed or lost.

Once doubts developed, investigators were attempting to reconstruct events that had already occurred years before.

That left the case dependent on a future break rather than forensic evidence from December 2000.

The break came from within the conspiracy itself.

“Mr & Mrs Murder” Brings the Case Back to 20/20

ABC’s “Mr & Mrs Murder” revisits a case built around several successive versions of the truth: first an apparent hunting accident, then a presumed drowning, then the theory that alligators had removed the evidence, and finally the revelation that Mike Williams had been murdered by a man he trusted.

The case also did not end with the 2018 verdict. Denise Williams’ appeal changed the legal outcome in a significant way. Her first-degree murder conviction was reversed, while the finding that she conspired with Winchester to kill Mike survived appellate review. The Florida appellate court’s final analysis states that the evidence supported the conspiracy conviction but did not establish the statutory requirements for holding Denise criminally responsible as a principal to the completed murder.

More than a quarter-century after Mike left home for what was supposed to be a December hunting trip, the facts established through the investigation present a stark ending. Mike was killed on December 16, 2000. His death was disguised as an accident. His remains stayed hidden for almost 17 years. Brian Winchester admitted shooting him and led investigators to his burial site. Denise Williams was convicted of conspiring in the plan and is serving a 30-year sentence after her murder conviction was overturned.

20/20: “Mr & Mrs Murder” airs Friday, September 18, 2026, at 9/8c on ABC.

More “Mr & Mrs Murder”

• “Mr & Mrs Murder”: 20/20 Reports on Mike Williams Homicide September 18 2026
• Who Was Mike Williams & What Happened to Him? 2026 Update & Profile
• Who Is Denise Williams & Where Is She Now? 2026 Update & Profile
• Who Is Brian Winchester & Where Is He Now? 2026 Update & Profile

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