In a Ventura department-store parking lot on May 6, 1996, a woman wearing a disguise approached Sherri Dally as though she had authority to detain her. Witnesses saw Sherri handcuffed and placed inside a Nissan sedan. The woman was Diana Haun. The badge and handcuffs were not signs that an officer had arrived; they were part of the abduction. The apparent exercise of official power allowed a murder plan to unfold in a public place. [1]
Case brief
Ventura, California · 1996
- Recorded outcome
- Diana Haun’s 1997 murder judgment affirmed in 2000; resentencing denial affirmed January 2023. Michael Dally separately convicted of first-degree murder in April 1998.
Key moments
People in this case
- Michael Dally and Diana Haun
Convicted in the murder of Sherri Dally
Photo at source · Oxygen · labeled photographs
The disguise did not make its wearer untraceable. Haun had bought preparatory items using credit cards and personal checks and had rented the car. Later, testing found bloodstains inside it consistent with Sherri’s DNA. A costume could mislead someone in the moment. Purchases, rental records, witnesses and biological evidence gave investigators a different way to identify what had happened. The case became a record of connected actions rather than a mystery solved by a single recognizable face. [1]
Don Ramey Logan · Image source · CC BY-SA 4.0 · This photograph provides setting or historical context. It is not an authentic crime exhibit.
The relationship behind the plan
Haun and Sherri’s husband, Michael Dally, worked together at a grocery store and had a sexual relationship. The court’s later account records that they traveled to Mexico together and shared an apartment for a time. Michael was reluctant to divorce Sherri for financial reasons. Those circumstances supplied the prosecution’s explanation for why the relationship became a conspiracy, but the affair itself was not proof that a killing had occurred or that either participant had carried it out. [1]
The distinction matters because this story contains different kinds of evidence. The relationship supplied context for motive. The purchases showed preparation. The parking-lot witnesses described the abduction. The rental car linked the visible event to physical evidence. None of those categories could simply replace the others. The trial required a case about intentional conduct and responsibility, not a judgment that an affair made everyone involved capable of murder. [1]
Sherri’s presence in the parking lot was ordinary; the danger came from an encounter made to look official. Haun’s disguise used the symbols of a role people are accustomed to taking seriously. The later opinion does not supply Sherri’s thoughts or words during the encounter, and this account does not invent them. What the record establishes is what witnesses saw: the handcuffs, the car and the departure. The false authority explains the method without requiring an imagined scene. [1]
Preparation that could be followed backward
Before the abduction, Haun obtained handcuffs, a security badge, a blond wig, tan clothing, sunglasses and a camping axe, among other items. Her own payment methods connected her to those purchases. She also rented a teal Nissan Altima. The court’s account is specific about the color and model, and the distinction is useful: a description from the record is stronger than a generic image of a car chosen to make the story look dramatic. [1]
The rental arrangement mattered beyond the fact that a vehicle was available. A rented car has a transaction connecting a person to a particular object for a period of time. Witness testimony could then be compared with that transaction and with what testing found inside the vehicle. The resulting chain was not dependent on knowing every mile the car traveled or every minute of the abduction. It connected preparation, the visible taking of Sherri and the evidence left afterward. [1]
One allegation involving a purchased object did not become a jury finding. Although the evidence included the axe purchase, the jury rejected the allegation that Haun personally used an axe. It did find personal use of a knife. A list of objects acquired before a crime therefore cannot be treated as a list of weapons conclusively used during it. The gallery keeps that difference visible rather than illustrating every purchased item as though it had an identical evidentiary role. [1]
The sedan beyond the parking lot
Michael was working at the grocery store when Haun abducted Sherri. That fact did not answer every question about conspiracy, but it did establish that the court’s account did not place him beside Haun during the parking-lot encounter. Later that evening, a motorist saw Haun sitting in a Nissan near the Canada Larga overpass. The sighting connected her and the vehicle to another part of the local geography. It did not provide a continuous observation of the car’s movements. [1]
About a month after the disappearance, Sherri’s remains were found in a ravine near Canada Larga Road. The medical examiner placed her death at or about the time of the abduction. That evidence undermined any account suggesting that the disappearance was a voluntary departure. It also limited the period investigators needed to explain. The medical finding placed the killing near the abduction, rather than weeks into the disappearance. [1]
Forensic testing of the Nissan’s interior revealed bloodstains consistent with Sherri’s DNA. That result tied the vehicle to her in a way the disguise could not conceal. It did not, standing alone, assign every action to every participant. Its significance was relational: the sedan Haun rented was the kind witnesses saw, Haun was seen in it later, and its interior contained blood linked to the missing woman. The evidence had several independent points of contact with the events. [1]
The map marks those locations as Ventura and county references. It does not draw a purportedly exact journey from the store to the ravine, and it does not supply unverified mileage. A line on a map can easily look more certain than the evidence behind it. Here, the chronological list lets the reader move from the rental to the abduction, the later sighting and the recovery while preserving the gap between known places and an unseen route. [1]
Ymblanter · Image source · CC BY-SA 4.0 · This photograph provides setting or historical context. It is not an authentic crime exhibit.
What the jury accepted—and rejected
In 1997, a jury convicted Haun of first-degree willful, premeditated and deliberate murder, conspiracy to commit first-degree murder, and kidnapping. It found the financial-gain special circumstance true. The court also recorded the personal knife-use finding. But the jury rejected the allegation that the killing was committed while lying in wait as well as the personal axe-use allegation. The verdict had boundaries even within a case that resulted in a severe sentence. [1]
After the penalty phase, the jury selected life without the possibility of parole. The trial court imposed that punishment and a consecutive one-year term for the knife enhancement; sentences on the other counts were stayed. The direct appeal was affirmed on November 28, 2000. Contemporary legal reporting also recorded that affirmance. A faithful account follows those dispositions individually rather than turning all of the original charges and allegations into one blanket finding. [1] [3]
Michael Dally was separately convicted of first-degree murder in April 1998. [2]
His separate conviction and the fact that he was at work during the abduction illustrate why responsibility for a conspiracy is a different question from physical presence at each event. The 2023 Haun opinion also records that Michael was the beneficiary of Sherri’s life-insurance policy and retirement account and asked about payouts days after her death. Those inquiries were part of the record, but they should not be transformed into an invented confession or a precise account of private conversations. [1]
A later law does not erase the record
In February 2020, Haun filed a petition under the California resentencing provision later numbered section 1172.6. She requested counsel and argued that the prosecution had proceeded under a form of murder liability affected by changes in the law. The trial court denied the petition in September without appointing counsel. Her later appeal raised a real procedural issue: a qualifying request should not have been rejected at that stage without the representation the statute required. [1]
The Court of Appeal agreed that the failure to appoint counsel was an error. It nevertheless found that error harmless in this case. The trial record had not included instructions on felony murder or the natural-and-probable-consequences doctrine. Instead, the jury had been instructed on Haun’s personal responsibility for deliberate, premeditated murder and had returned the relevant findings. The court concluded that she was the actual killer and could not obtain relief through the statutory change she invoked. [1]
That January 2023 decision affirmed the denial; it was not a new jury trial or a new reconstruction of Sherri’s final hours. It is also an unpublished opinion, used here as a record of this case rather than as a rule for other defendants. The distinction between an error and a remedy is part of the story’s final twist. A court can find that a procedure was wrong while also determining that correcting it would not change a petitioner’s legal eligibility. [1]
Csouthard · Image source · CC BY-SA 3.0 · This photograph provides setting or historical context. It is not an authentic crime exhibit.
Reading past the disguise
The badge made the abduction look like something it was not. The investigation moved in the other direction, breaking the appearance into verifiable pieces: objects acquired, a car rented, an encounter witnessed, a later sighting and biological evidence. The jury then drew its own boundaries, accepting some allegations and rejecting others. Following all of those steps gives Sherri’s case a clearer shape than treating the costume as a theatrical detail or the affair as the whole explanation. [1]
The photographs accompanying this article provide geographic context. They are not pictures of the actual parking-lot encounter, the rental car or the recovered remains. The evidence gallery uses labeled illustrations to compare the purchases, witness accounts and verdict findings. Together with the chronological map, it lets the reader follow how an apparently official detention was exposed as a deliberate abduction—and how the resulting conviction was examined again years later.
Look closer · 9 visuals
Inside the evidence.
Open a visual to explore what it contributed to the case—and the limits of what it shows. Photographs, historical reproductions and original illustrations are individually labeled. Open the notes for each image’s source, credit, and limitations; setting photographs do not depict crime scenes.
The costume left a paper trail
Original editorial illustration — not an actual evidence photograph or exhibit.
Read the evidence notes
Purchased objects linked Haun to the false-officer disguise.
Objects are drawn symbols, not photos of recovered exhibits.
The vehicle that connected locations
Original editorial illustration — not an actual evidence photograph or exhibit.
Read the evidence notes
The sedan connected preparation, abduction and physical evidence.
No exact driven route or total mileage is reconstructed.
Witnesses saw a false arrest
Original editorial illustration — not an actual evidence photograph or exhibit.
Read the evidence notes
Eyewitnesses described Haun placing Sherri in the car.
No staged portrait or recreation of the abduction.
The jury’s actual findings
Original editorial illustration — not an actual evidence photograph or exhibit.
Read the evidence notes
The verdict did not adopt every allegation made at trial.
A rejected enhancement is not proof that an object was never purchased.
Presence and conspiracy differ
Original editorial illustration — not an actual evidence photograph or exhibit.
Read the evidence notes
The two defendants’ legal roles cannot be reduced to who was seen abducting Sherri.
Michael’s conviction is separately sourced; no unseen scene is invented.
Why the 2023 request failed
Original editorial illustration — not an actual evidence photograph or exhibit.
Read the evidence notes
The court distinguished a procedural mistake from eligibility for the statutory remedy.
Unpublished case-specific judicial record.
An aerial view of Ventura and its coastline
Geographic context photograph — not a crime-scene image.
Read the evidence notes
An aerial view of Ventura and its coastline. Geographic context photograph; not a crime-scene photograph or an authentic exhibit.
This photograph provides setting or historical context. It is not an authentic crime exhibit. The source and reuse terms are linked below.
Don Ramey Logan · Image source · CC BY-SA 4.0
Ventura County Courthouse building
Geographic context photograph — not a crime-scene image.
Read the evidence notes
Ventura County Courthouse building. Geographic context photograph; not a crime-scene image or proof of an event on the map.
This photograph provides setting or historical context. It is not an authentic crime exhibit. The source and reuse terms are linked below.
Ymblanter · Image source · CC BY-SA 4.0
Ventura Beach and the Pacific coast
Geographic context photograph — not a crime-scene image.
Read the evidence notes
Ventura Beach and the Pacific coast. Geographic context photograph; not a crime-scene photograph or an authentic exhibit.
This photograph provides setting or historical context. It is not an authentic crime exhibit. The source and reuse terms are linked below.
Csouthard · Image source · CC BY-SA 3.0
★ Key evidence used in a conviction · ✓ Exclusion or reversal · ◇ Disputed evidence · ⊘ Excluded at retrial · ◆ Identity / investigative finding, not a conviction. A symbol does not mean one item proved the whole case.
Follow the locations
Put the story on the map.
Follow the dated entries, then select an event to find its regional setting. Shared-location pins open a group of events. Evidence symbols identify important findings and their limitations.
Open the map in its own window ↗Sources & further reading
- People v. Haun, B307581 — California Court of AppealUnderlying evidence, 1997 verdict findings, 2000 affirmance, 2020 petition and 2023 decision. Unpublished government judicial text.
- Dally found guilty of first-degree murder — Los Angeles TimesMichael Dally’s separate April 1998 conviction only; fewer than 25 derived words.
- Appellate court OKs woman getting life — Daily JournalIndependent contemporary report of Haun’s life sentence and direct-appeal affirmance; limited paraphrase.
Editorial review: 2026-10-06 · 1565 words