Authorities said the witness physically removed the accused man as he tried to use a lighter.
DRYDEN, N.Y. — An unidentified witness prevented a woman and two children from being set on fire by physically stopping a man who had allegedly soaked them and their Dryden home with gasoline, the Tompkins County Sheriff’s Office said.
The intervention on June 6 separated an alleged gasoline assault from a potentially fatal fire and became the pivotal act in the account released by investigators. Authorities said Matthew J. Demming, 53, tried to ignite the fuel with a lighter after confronting the woman on her porch. The witness stopped him before a fire began. Demming was arrested nearby and charged with attempted murder and four additional offenses. The three alleged victims were decontaminated and suffered no reported physical injuries.
The Sheriff’s Office has released little information about the person who intervened. Officials have not provided the witness’s name, age, connection to the household or reason for being at the Schwan Drive property that morning. They have not said whether the witness saw the entire confrontation or arrived after gasoline had already been poured. The agency’s description is brief but direct: Demming attempted to ignite the gasoline with a lighter before the witness intervened and physically removed him. That action apparently ended the immediate threat and created time for the woman, children and other people at the scene to await emergency crews. Investigators have not said whether the witness was exposed to gasoline, injured while restraining Demming or treated by firefighters.
The encounter had begun minutes earlier as a reported dispute. Deputies and New York State Police were dispatched at about 10:18 a.m., according to the county’s statement. While they were still traveling to the address, witnesses reported seeing a white man pouring gasoline on the residence before leaving. The woman later told investigators that Demming had appeared at the home despite a court-issued order of protection. Authorities said an argument unfolded on the front porch with her two children nearby. Demming then allegedly picked up a gasoline container kept beside the home and emptied fuel onto the woman, both children and the building. The Sheriff’s Office has not disclosed what led the witness to step in or how the person managed to remove Demming without the gasoline catching fire.
That missing detail is likely to matter as the prosecution develops. A witness who personally saw the lighter, the gasoline and Demming’s movements could provide direct evidence about intent, timing and proximity. The account could help prosecutors distinguish an uncompleted threat from conduct that moved close enough to a killing to support attempted murder. It may also establish whether Demming made statements before or during the alleged ignition effort. Authorities have not released any such statements, and they have not said whether multiple people witnessed the same acts. Investigators may compare witness accounts with physical evidence, emergency-call recordings, photographs, clothing, the gasoline container and the lighter. Any differences in what people saw would be examined during hearings or a possible trial.
The woman and children also are central witnesses, though officials have protected their identities. Investigators did not provide the children’s ages or say whether they were standing together when the gasoline was poured. The county statement describes all three as having fuel poured on them, but it does not specify how much reached each person or whether their clothing was saturated. Officials also have not said whether the woman attempted to move the children away, struggled with Demming or called for help. Their accounts may supply facts that the unidentified witness could not see, including the beginning of the argument and any earlier communication connected to the protection order.
Firefighters from the Varna Volunteer Fire Company arrived after law enforcement was called and helped decontaminate the three alleged victims. The response shifted quickly from preventing violence to controlling a chemical and fire hazard. Gasoline on clothing, hair, skin and a building can remain dangerous even when no flame appears. Emergency workers therefore had to reduce the risk that vapor or residue would ignite later. Officials reported no physical injuries, and no fire was recorded in the county’s account. The Sheriff’s Office did not say whether the victims changed clothing at the scene, were washed with water or received further medical evaluation. It also did not report whether the residence had to be temporarily cleared.
Deputies located Demming in the surrounding area shortly after the confrontation. He was taken into custody without incident, ending the search described by witnesses who had seen a man leave the property. Authorities have not said whether the witness released Demming after moving him away or whether he broke free and departed. They also have not disclosed whether officers found him on foot, in a vehicle or at another address. The arrest report lists no injury to Demming and no additional confrontation with police. Investigators then charged him with second-degree attempted murder, first-degree criminal contempt, aggravated family offense and two misdemeanor child-endangerment counts.
The attempted-murder charge places special weight on what happened in the seconds before the witness acted. New York’s attempt statute requires proof of intent to commit the underlying crime and conduct tending toward its completion. Prosecutors therefore must do more than show that gasoline was present or that an argument occurred. They would need to prove beyond a reasonable doubt that Demming intended to cause death and took action advancing that purpose. The alleged use of a lighter after pouring fuel is the conduct cited by investigators. Demming is presumed innocent, and the public record does not yet include his response to the accusations.
The contempt count focuses on a different question: why Demming was at the home at all. Deputies said a court-issued order of protection prohibited the contact, but they did not release its exact terms. Some orders require a person to remain away from a protected individual, residence, workplace or school. Others prohibit threats, harassment or specified communication. To prove first-degree criminal contempt under the theory suggested by the arrest account, prosecutors would need evidence that the order was valid, that Demming knew about it and that his alleged conduct met the criminal statute. The witness may be able to describe what occurred at the property, but court records will be needed to establish the order itself.
Demming’s aggravated-family-offense charge suggests prosecutors also believe a qualifying earlier conviction is relevant. State law treats that offense as a Class E felony. The Sheriff’s Office did not identify any prior case, and the charge remains an accusation. The agency also declined in its public account to define the relationship between Demming and the woman. Those omissions limit what can be concluded about the background of the dispute. The filed charges indicate that investigators view the confrontation within a family-offense framework, but they do not reveal whether the adults were current or former partners, relatives, members of the same household or connected in another way recognized by law.
After processing, Demming was taken to the Tompkins County Jail for an 8 p.m. centralized arraignment. A judge ordered him held on $100,000 cash bail or $200,000 bond. The county did not identify the judge, defense lawyer or prosecutor appearing at that proceeding. It also did not provide a plea or next court date. The arraignment was the first formal step, not a finding that the allegations were true. Prosecutors may next gather sworn testimony, seek additional records and decide how to present the felony case. Defense counsel can challenge the evidence, question witnesses and seek review of detention conditions.
The witness’s identity may remain outside public reports even as that person becomes important inside the courtroom. Prosecutors generally disclose witnesses through the legal process, subject to rules protecting safety and the integrity of an investigation. If the case reaches a hearing or trial, the person could be asked to describe the porch, the gasoline, the lighter and the physical intervention in detail. Defense lawyers could test the person’s ability to observe, memory and relationship to those involved. For now, officials have offered no independent video or documentary record showing the decisive moment.
The case remains pending with Demming accused of five crimes and held under the bail terms set at arraignment. No indictment, preliminary-hearing result or later appearance had been announced in the available reports. Until the next court filing, the witness is publicly known only through the action investigators say prevented the alleged attack from becoming a fire.
Author note: Last updated July 10, 2026.