This account is based on the supplied transcript, public reporting, trial testimony summarized by local news, and the April 9, 2026 opinion of the Texas Tenth Court of Appeals. The victim was Mandy Rose Reynolds, 26, and the man ultimately convicted of her murder was her cousin, Derek Joseph Daigneault. The body was discovered on April 5, 2023, near Heston Circle in Robinson, Texas. Daigneault was convicted in November 2024 and sentenced to life in prison, with parole eligibility only after at least 30 years. On April 9, 2026, the Tenth Court of Appeals affirmed both his conviction and life sentence.
The source transcript also connects Daigneault to the earlier death of a Wichita woman, but publicly available police reporting identified that woman as 40-year-old Shanoha Hansell and described the cause and manner of her death as under investigation. I found no reliable public record establishing that Daigneault was charged with, convicted of, or officially identified by law enforcement as the killer in Hansell's death. Any family suspicions or investigative questions about that separate case should therefore remain allegations, not fact.
THE FIRE IN ROBINSON
The first minutes of the response were recorded almost entirely as officers trying to understand what they were seeing while also protecting the scene. Atkins asked dispatch whether he should use the extinguisher or leave the fire untouched. The answer was practical: stop the flames before they consumed whatever remained. After doing so, he stayed back and warned arriving personnel not to crowd the area.
One officer asked simply, "Is it a body?" Atkins answered yes. Another reacted with shock, but the conversation quickly turned procedural. They discussed where officers had already walked, who would be allowed closer, and whether a canopy could be positioned over the remains before another burst of rain. The goal was to avoid turning the muddy field into an even more contaminated scene.
The fire marshal and detectives later debated what could and could not be inferred from the condition of the remains. Early speculation ranged from accidental burning to a person dying elsewhere before the fire started. One investigator noticed an unusual opening in the skull and wondered whether it represented trauma, but the officers correctly left that question for the medical examiner instead of treating a visual impression at a burned scene as a final cause-of-death determination.
They also discussed the odor and the possibility that decomposition had begun before the body was burned. That observation became important only later, when the autopsy and trial evidence established that Mandy had been dead before the fire. At the scene, however, the officers did not yet know her identity, when she died, or whether the killing had happened in Robinson at all.
Shortly after 10:00 p.m. on April 5, 2023, a violent spring storm was moving through Robinson, Texas. Lightning, rain, and intermittent hail were sweeping across the area when a caller reported what appeared to be a brush fire near a developing residential subdivision. Because construction was underway nearby and the weather was unstable, the report did not initially sound like a homicide call. Dispatch sent Robinson police to check the fire.
Corporal Jason Atkins was among the first officers to reach the field. As he moved closer, what looked from a distance like burning debris took on a shape he immediately recognized as something much worse. He radioed for the fire department and additional officers, telling dispatch that it appeared to be a body. Unsure whether extinguishing the flames might damage evidence, he asked what to do and then used a dry-chemical fire extinguisher to stop the fire from consuming more of the scene.
When another officer reached him, Atkins warned him to be careful. He had approached only far enough to put out the flames and had deliberately avoided walking around the body. The officers could already tell the victim was likely female, but the fire had made visual identification impossible. Rain began falling again, creating a second threat to whatever evidence the flames had not already destroyed.
Investigators called for pop-up canopies to shield the immediate scene. Officers later described the weather as a short but intense storm that included heavy rain and dime-sized hail. The combination of fire, rain, wind, mud, and hail made preservation extraordinarily difficult. One investigator described it as a nearly perfect combination for the destruction of evidence, though there was no proof at that stage that the person who left the body had deliberately chosen the weather.
A DOG AT THE EDGE OF THE SCENE
The dog quickly became a repeated subject on the body-camera audio. Officers radioed animal control and told dispatch that the animal might belong to the victim because it kept returning toward the burned area and barking. They tried lowering the tailgate of a truck and calling the dog in a friendly voice, hoping it might jump inside. Nothing worked.
The animal was frightened but would not leave the general area. To officers, that behavior was strange enough to document even before they understood its meaning. At one point, they joked that even a steak might not be enough to convince the dog to approach them. When the animal finally ran off, investigators worried they had lost a potentially useful identifying clue.
The following morning changed that. The dog had returned to the exact location where the body had been. Once animal control finally secured him, the microchip scan produced a name, Titan, and an owner, Mandy Rose Reynolds. In a case where fire and weather had erased so much, the least technical clue on the scene became the fastest path to the victim's identity.
As officers worked, they noticed a white dog circling nearby. The animal repeatedly moved toward the location where the body had been burning, barked, then backed away whenever officers approached. At first, the dog was simply another problem to manage at an unstable crime scene. Then officers began to wonder whether it belonged to the victim.
Animal control was requested, but the dog would not allow anyone close enough to catch it. Officers tried coaxing it toward a pickup truck and called to it repeatedly. The dog eventually disappeared toward nearby homes, leaving investigators with no immediate way to identify it.
The next morning, however, a Robinson resident saw the same dog sitting at the exact location where the burning body had been found. This time the animal was captured. A microchip scan identified him as Titan, a white Labradoodle, and listed his owner as 26-year-old Mandy Rose Reynolds.
That single microchip transformed the investigation. Until then, detectives had a homicide victim with no name, no known home, and no known connection to Robinson. Titan gave them a person to investigate and an address more than 100 miles away in San Marcos, Texas.
WHAT THE AUTOPSY SHOWED
The medical examination confirmed that the fire had not caused Mandy's death. She had been shot in the head before her body was burned. Investigators later recovered a .380-caliber projectile from her remains and a .380 shell casing from the debris at the Robinson scene.
Trial evidence later showed that Mandy had already begun decomposing before the fire, which meant investigators could not simply assume the shooting occurred immediately before the body was transported to Robinson. The exact time and location of the shooting would remain less certain than the identity of the person the jury later found responsible.
Among the material recovered from the fire were pieces from a large plastic storage container and an urn containing ashes that Mandy had kept among her belongings. Metal curtain rings recovered from the fire would later be compared with a curtain found among property removed from Mandy's apartment. Those details became small but important links between the scene in Robinson and the life Mandy had been living in San Marcos.
THE EMPTY APARTMENT
The San Marcos welfare check added a different kind of unease. Mandy's friend, who also had access to the apartment complex, told officers that Mandy normally stayed in frequent contact and that several days of silence were out of character. She knew Mandy had been talking about moving, but she had not expected the apartment to be stripped so abruptly.
As officers walked through the unit, they asked about the people closest to Mandy. Her friend mentioned a former fiance, another ex-boyfriend, and the cousin who had recently been staying with her. She described friction in Mandy's personal life and said Mandy had recently tried to create distance from at least one former partner. Those names initially gave investigators several possible directions rather than a single suspect.
Inside the apartment, the lack of obvious violence was almost as unsettling as finding blood would have been. There was broken glass in one area, but no clear evidence at that moment showing that a homicide had occurred there. The larger fact was that Mandy appeared to have vanished while most of her belongings, her car, and eventually her phone were moving without her.
That distinction mattered later. Prosecutors never had to prove beyond all doubt that Mandy was shot inside the apartment. Instead, the State built a chain showing that after Mandy disappeared, Daigneault controlled the things most closely tied to her: the Honda, Titan, the phone, and the handgun that ballistics later identified as the murder weapon.
San Marcos officers were asked to conduct a welfare check at Mandy's residence. Her best friend and apartment manager helped officers locate the unit. The people closest to Mandy said they had not heard from her for several days, which was unusual. They also knew she had been unhappy with her living situation and had discussed moving.
When officers entered the apartment, they did not find Mandy. They also did not find the kind of obvious bloodshed or disorder that would immediately identify the unit as a homicide scene. What stood out instead was how empty it was. Furniture and possessions had been removed. Mandy's black Honda Accord was gone as well.
The missing car mattered. Investigators entered its information into law-enforcement systems and began reviewing license-plate-reader data. At the same time, they started looking at the people who had recently been around Mandy, including former romantic partners and the relative who had been staying with her.
That relative was Derek Joseph Daigneault, Mandy's cousin. Trial testimony later showed that Mandy had driven from Texas to Kansas to pick him up while he had an active warrant and was on felony probation. He then stayed with her in San Marcos for roughly a month. Mandy's father testified that, before her death, she had expressed fear of Daigneault and was considering getting away from him.
THE WALMART VIDEO
A major break came from surveillance footage in San Marcos. On April 4, the day before Mandy's body was found in Robinson, video showed Daigneault driving Mandy's Honda Accord to a Walmart. He purchased a large blue-and-black plastic storage container, a shovel, and a gas can. Titan could be seen in the car, his head visible near the passenger-side window.
The container was particularly important because its hardware resembled pieces recovered from the burned debris in Robinson. Daigneault first tried to place the large container in the trunk of the Honda, but it would not fit. The footage showed him loading it into the vehicle another way.
He then drove to a Lowe's, where surveillance showed him purchasing additional items, including a bucket and heavy tape. Cell-phone records placed Mandy's phone in the same areas where Daigneault was seen making those purchases. Mandy herself was not visible with him.
Investigators also traced Mandy's phone north on Interstate 35 on April 5. The phone moved through communities including Round Rock, Georgetown, Bruceville-Eddy, and Lorena before reaching the Robinson area. Ring-camera footage from the subdivision captured a black vehicle resembling Mandy's Accord driving toward the area shortly before the fire was first noticed.
A resident saw the fire at approximately 9:20 p.m. The phone later traveled south again, stopping near Austin before returning to San Marcos after midnight. A receipt recovered from the Honda later corroborated one of those stops. The movement of the phone, the car, and Daigneault became central parts of the prosecution's circumstantial case.
THE CALL FROM "MANDY"
The impersonation call was one of the strangest moments in the investigation. The caller opened by saying he had received a message that police had found "my dog" and claimed to be Mandy. He described Titan and said the dog had run away while he was traveling toward Wichita. Perry listened while asking basic questions about where the dog had been lost and why he had ended up more than 100 miles away near a homicide scene.
The caller quickly became defensive. When Perry explained that the dog had been placed on a police hold because he was connected to a deceased person, the caller reacted with surprise and tried to redirect the conversation toward getting Titan back. Perry kept his tone calm, repeatedly explaining that he needed to verify how the animal had reached Robinson.
Then came another red flag: the phone number did not match what investigators expected for Mandy. Perry asked whether the caller was using someone else's plan. The person avoided giving a clear explanation and eventually said he could not spend the day speaking with the detective. He demanded that Perry stop calling and hung up.
Perry called back. During the second conversation, he was more direct about the crime scene and again asked how Titan had reached the field. The caller continued insisting that the dog was his and treated the questions as an inconvenience. By then, Perry believed he was not speaking with Mandy at all. The later voice identification, phone evidence, and rapid deletion of Mandy's Facebook account made the call far more significant than a simple attempt to recover a missing pet.
After Titan was identified, Robinson authorities sent a notification connected to Mandy's information indicating that police had found her dog. Soon afterward, the department received a telephone call from someone claiming to be Mandy Reynolds.
The caller said Titan had run away while she was traveling and wanted to know how to retrieve him. Detective Marshal Perry immediately noticed problems. Investigators had already tentatively identified Mandy as the woman whose body had been found in Robinson, and the voice on the telephone sounded male.
Perry continued talking rather than confronting the caller immediately. The person provided personal information about Mandy, but the detective remained unconvinced. During the conversation he could hear windshield wipers in the background, and later evidence placed Mandy's car in heavy rain around the same period.
When Perry explained that Titan had been found in connection with a crime scene and asked for more information, the caller became defensive and eventually demanded that police stop calling. Investigators traced the activity connected to Mandy's phone and continued building their case. Perry later testified that he recognized the caller's voice as Daigneault's. Mandy's friend also identified the voice as his.
According to the appellate record, moments after police challenged the impersonation, Mandy's Facebook page was deleted. Investigators monitoring the account saw material disappear before the page was deactivated. Instead of recovering Titan, the caller had given detectives another link between Mandy's missing property and the person using her identity.
THE CAR HEADS TO KANSAS
The Wichita encounter was captured through police radio and body-camera footage. When officers identified Mandy's Honda, they attempted a traffic stop. The driver accelerated through traffic, forcing patrol units to coordinate a moving perimeter while warning other officers about the danger to motorists. The chase ended only after the Honda crashed near 13th and Tyler.
Daigneault then ran into a Dillon's grocery store. Officers rushed to move families and shoppers out of potential lines of danger while teams entered from different directions. They repeatedly ordered the suspect to show his hands and crawl toward them if he could hear their voices. Within minutes, officers found him concealed low on a shelf behind store merchandise.
He appeared impaired and was transported for medical treatment before being booked. The arrest itself initially involved Kansas offenses arising from the pursuit rather than an immediate Texas murder conviction. Robinson detectives still needed to assemble evidence showing why the man driving Mandy's car in Kansas was connected to the woman burned in a field hundreds of miles away.
Inside the car, however, the evidence began connecting those two worlds. Officers found Mandy's .380 pistol, loose ammunition, property tied to the trip, and records that helped investigators reconstruct Daigneault's movements. Once ballistics came back, the connection became much stronger.
Mandy's Honda did not remain in Texas. Investigators determined that it was traveling north toward Kansas. Near Hillsboro, Texas, location information for Mandy's original phone stopped. Police later found a receipt indicating that Daigneault used information associated with his incarcerated brother to purchase another phone.
By April 8, Wichita police had been alerted that the Honda might be connected to a Texas murder investigation. A Flock license-plate-reader system detected the car on the west side of Wichita. Officers moved in to stop it.
Daigneault did not pull over. He accelerated, beginning a pursuit that lasted roughly 30 minutes and at times exceeded 100 miles per hour. Police said he struck or sideswiped vehicles during the chase before crashing near 13th Street and Tyler Road.
He abandoned the Honda and ran into a busy grocery store as officers surrounded the building. Customers were directed away while police searched aisles and storage areas. Daigneault was eventually found hiding low behind merchandise on a store shelf and taken into custody.
THE GUN IN MANDY'S CAR
The crashed Honda contained some of the strongest physical evidence in the case. Officers recovered a Bersa .380 semiautomatic pistol from the car along with .380 ammunition. The gun had belonged to Mandy's grandmother and had been kept by Mandy.
At trial, a Texas Department of Public Safety firearms examiner testified that the bullet recovered during Mandy's autopsy and the shell casing found with the burned remains had both been fired from that pistol. The murder weapon had therefore traveled to Kansas in Mandy's car, which Daigneault was driving when police tried to stop him.
Investigators also recovered other property consistent with the surveillance evidence, including items tied to his movements after Mandy disappeared. The combination was difficult to explain away: Mandy's car, Mandy's phone activity, Mandy's dog, Mandy's gun, and the supplies seen being purchased shortly before the body was burned all converged on Daigneault.
The State still did not have an eyewitness to the shooting. The case was largely circumstantial. But the Texas Court of Appeals later emphasized that circumstantial evidence is not lesser evidence under Texas law and held that the combined force of the evidence was sufficient for a rational jury to find that Daigneault killed Mandy and burned her body.
THE SEPARATE KANSAS QUESTIONS
During the early investigation and in later true-crime retellings, another woman's death in Wichita was sometimes linked to Daigneault. The woman was Shanoha Hansell, 40, whose body was found near South Rock Road on February 28, 2023. Wichita police publicly said the cause and manner of her death were under investigation.
The supplied transcript describes Hansell as Daigneault's girlfriend and suggests investigators believed he might have been connected to her death. Public reporting does establish that friends or relatives later voiced suspicions, but I found no reliable public record showing that Daigneault was charged with killing Hansell or that police publicly concluded he was responsible. He should therefore not be described as a proven serial killer or as the convicted killer in that separate case.
What is well documented is Daigneault's extensive criminal history. Prosecutors later told the Texas jury that he had multiple prior felony convictions in Kansas, including aggravated burglary, attempted aggravated robbery, aggravated assault, aggravated battery, criminal discharge of a firearm at a residence, methamphetamine possession, fleeing law enforcement, and weapons offenses. His history became relevant during the punishment phase after the jury convicted him of Mandy's murder.
THE PROSECUTION'S RECONSTRUCTION
Before the Texas case went to trial, detectives also questioned Daigneault about what had happened. The supplied transcript shows him trying to explain his recent movements through a bizarre story about a cartel, claiming he had been forced to participate in events and even alleging that cartel members had shot him while he wore body armor. Detectives examined him and did not see the kind of visible injury they expected from the account he was giving.
When they pressed him on Mandy's car, he admitted the car belonged to his cousin but said taking it had not been his choice. He then resisted direct questions about where Mandy was and returned to the cartel story. Detectives offered him opportunities to say whether someone else had forced him to hurt Mandy or had made him witness her death. He denied killing her and eventually shut down that line of conversation.
The interrogation did not produce a confession. It did, however, illustrate the difference between Daigneault's explanations and the objective timeline investigators were building from surveillance, phone records, the Honda, the Walmart purchases, and the weapon. His mother also told him during a phone conversation that she believed he had not killed Mandy, but a relative's belief could not resolve the evidence.
By trial, prosecutors did not rely on the cartel account. They relied on the physical and digital evidence. They argued that the increasingly elaborate alternative explanations did not fit the sequence documented by cameras and cell towers.
Prosecutors argued that Mandy had allowed Daigneault to stay with her after bringing him from Kansas to Texas, but that the arrangement deteriorated. Her father testified that she had become afraid of him. The evidence showed Daigneault using her car and phone, buying the large storage container and other supplies, traveling north toward Robinson, and later heading to Kansas with her property.
The State's theory was that Daigneault shot Mandy in the head with her .380 pistol, placed her body in the storage container, drove it to Robinson, and set the container on fire. The appellate opinion did not require the State to prove a specific motive, and no single motive was conclusively established. The critical question for the jury was identity: whether the accumulated evidence proved Daigneault was the person who killed her.
The defense challenged the investigation and argued that important forensic testing had not been done. Investigators acknowledged that they had not requested DNA or fingerprint testing on every item, including the pistol and shell casing. The defense also sought to introduce evidence suggesting other people could have harmed Mandy, but the trial judge excluded portions of that proposed alternate-perpetrator evidence.
Those issues later became part of Daigneault's appeal. He argued both that the evidence was insufficient and that the trial court had improperly limited his ability to present another possible offender. The appellate court ultimately rejected both arguments.
THE TRIAL
Daigneault's murder trial began in Waco's 19th State District Court in November 2024. Visiting Judge Roy Sparkman presided. Prosecutors Ryan Calvert and Alyssa Killin presented testimony from officers and forensic personnel in Robinson, San Marcos, and Wichita, showing how the investigation moved across three jurisdictions.
Jurors saw surveillance from Walmart and Lowe's, footage from the Wichita pursuit and grocery-store arrest, cell-phone-location evidence, license-plate-reader records, Ring-camera footage, photographs of the Robinson scene, and the firearm comparison linking Mandy's gun to the bullet and shell casing. They also heard how Titan remained near the body and how his microchip gave investigators Mandy's name.
The defense emphasized the absence of an eyewitness and attacked gaps in the forensic work. Daigneault did not testify. After a four-day trial, the jury deliberated for roughly 35 minutes before finding him guilty of murder.
The punishment phase then brought his prior criminal record before the jury. Prosecutors argued that his long history of violent and felony offenses showed that he remained a danger. The jury sentenced him to life in prison. Under the sentence reported at the time, he must serve at least 30 years before becoming eligible for parole; eligibility does not guarantee release.
Mandy's mother, stepfather, and older brother gave victim-impact statements. During his cousin's statement, Daigneault repeatedly interrupted and accused him of wrongdoing until the judge ordered him removed from the courtroom. Afterward, when a reporter asked about the murder conviction, Daigneault made a brief remark effectively acknowledging that the jury had now branded him a murderer, though he continued to pursue an appeal.
THE KANSAS SENTENCE
The Wichita pursuit produced a separate criminal case. Daigneault later pleaded guilty in Kansas to offenses arising from the chase and other conduct, including fleeing or attempting to elude law enforcement, aggravated battery, criminal possession of a weapon by a felon, and theft. In March 2024, a Kansas judge sentenced him to 111 months in prison in that separate case.
That sentence did not replace the Texas murder prosecution. Once Texas obtained him for trial, the McLennan County case proceeded independently, ultimately producing the life sentence for Mandy's murder.
THE APPEAL
Daigneault appealed his Texas conviction to the Tenth Court of Appeals. He argued that the evidence was not legally sufficient to prove he was the killer and that the trial judge wrongly excluded evidence the defense wanted to use to support an alternate-perpetrator theory.
On April 9, 2026, the appellate court affirmed the judgment. The court reviewed the evidence in the light most favorable to the verdict and concluded that the cumulative circumstances were sufficient for a rational jury to find Daigneault guilty beyond a reasonable doubt. The opinion specifically referenced his impersonation of Mandy, the purchases captured on surveillance, his possession of her car and firearm, the high-speed flight from Wichita police, the matching ballistics, and the location data connecting Mandy's phone to the stores and the Robinson area.
The court also upheld the trial judge's evidentiary ruling. As of August 2026, the conviction and life sentence therefore remain in effect following that intermediate appellate decision.
TITAN
Throughout the case, one fact remained unusually simple. Titan could not speak, identify a suspect, explain what he saw, or understand the investigation unfolding around him. He simply stayed close to the place where his owner had been left.
That behavior gave police the clue they needed when almost everything else at the scene had been damaged by fire and weather. His microchip turned an unidentified victim into Mandy Reynolds. Mandy's name led police to San Marcos. San Marcos led them to the empty apartment and missing Honda. The Honda led to Kansas. The investigation then linked the vehicle, phone, purchases, weapon, and Daigneault into a single evidentiary chain.
After Mandy's death, Titan was taken in by one of her close friends. Prosecutors later said he was doing well. The dog that officers initially could not catch became one of the most memorable elements of the case not because he solved a murder by himself, but because his presence gave investigators the first reliable path toward identifying the woman in the burned field.
Mandy Rose Reynolds was 26 years old. The trial established that she had allowed a cousin with a serious criminal history into her home and later became afraid of him. What happened next was pieced together not from a confession or a living eyewitness, but from small details that survived: a dog, a microchip, a camera, a cell-phone trail, a plastic container, a shell casing, and a gun recovered hundreds of miles away.
The storm that night damaged evidence, and the fire destroyed much of what investigators might otherwise have recovered. It did not destroy enough. The evidence that remained was sufficient for a Texas jury to convict Derek Joseph Daigneault, and in April 2026 an appellate court concluded that the verdict was supported by the record.