A 27-year-old Litchfield Park, Arizona, man has been named the prime suspect in the double homicide of his parents, whose bodies were unearthed from shallow graves in the family's backyard, and authorities believe he fled the country before anyone knew they were missing.
Avondale police officers arrived at the home on August 4 after relatives requested a welfare check on the couple. The house was empty. Inside, officers found what spokesman Daniel Benavidez described as "a large amount of blood" and clear signs that someone had tried to clean it up. Two days later, on August 6, homicide detectives brought in a mini excavator and pulled two bodies from shallow graves dug in the backyard.
The department named Matthew Flores, 27, as the prime suspect in the killings of his parents. Investigators believe he left the United States shortly after the alleged murders, though police have not said which country he may have gone to. The FBI and U.S. Marshals Service have joined the Avondale Police Department in what officials are calling an international manhunt.
Pending autopsy records from the Maricopa County Medical Examiner's Office identified the victims as Hector Flores and Larissa Flores, a couple in their 60s. Police did not publicly identify them; the names surfaced through the medical examiner's records. Benavidez told the New York Post that the bodies were found "in a state of decomposition," adding, "I can't tell you how many hours or days."
Blood, cleanup, and a quiet neighborhood nobody expected to make headlines
Litchfield Park sits just west of Phoenix. Neighbors described it as the kind of place where nothing happens. One resident who spoke to AZFamily captured the disbelief plainly:
"I was so confused and I'm honestly still so confused just seeing all this because our neighborhood is super quiet. We don't really have much going on here. I don't even really see my neighbors for the most part. I don't really see them come home. I don't see them leave. It's a super, super quiet neighborhood. So this is a shock to all of us."
Another neighbor gave a similar reaction to FOX10: "I never thought anything like this would go on around here." Others who spoke to the local station described Hector and Larissa Flores as pleasant and "very friendly."
The case carries grim echoes of a recent domestic mass shooting in Livonia, Michigan, where multiple family members were found dead inside a home and the suspect walked away from the scene. In both instances, the violence unfolded behind closed doors in neighborhoods that had no reason to expect it.
What distinguishes the Litchfield Park case is the apparent effort to conceal the crime. The blood and attempted cleanup inside the house suggest the killings happened indoors. The shallow graves in the backyard suggest a deliberate attempt to hide the bodies. And the suspect's alleged flight from the country suggests he had no intention of facing consequences.
Three federal and local agencies now chasing a suspect across borders
Fox News reported that the FBI and U.S. Marshals joined the Avondale Police Department in the manhunt after it became clear Flores had likely crossed an international border. Authorities have not disclosed how they determined he left the country, what mode of travel he used, or when precisely he departed.
Police also have not said when the killings occurred. The welfare check came on August 4, but investigators have offered no timeline for how long the bodies may have been buried before relatives raised the alarm. The autopsies, still pending, may eventually establish a cause and approximate time of death.
No formal charges or arrest warrant have been publicly announced, though naming Flores as the prime suspect signals that investigators believe they have enough evidence to tie him directly to the deaths. The case recalls another Arizona homicide near Glendale in which a suspect attempted to evade authorities after a killing.
One significant open question hangs over the investigation: whether Flores fled to a country that has a formal extradition treaty with the United States. If he reached a nation without one, the legal process of bringing him back could drag on for months or years, or stall entirely.
Family asks for privacy as investigation continues
Relatives of the victims released a statement through a representative, identifying themselves as the Flores Semyonov family:
"The Flores Semyonov family is devastated by recent events. They are fully cooperating with law enforcement. Because this is an ongoing investigation, the family respectfully asks for privacy during this difficult time. Their deepest gratitude is extended to their loved ones, neighbors, and the community at large who have expressed concern."
The statement raises its own questions. The surname Semyonov has not been explained in any public account, and the relationship between that name and the Flores family remains unclear. But the family's cooperation with law enforcement, stated publicly, draws a sharp contrast with the actions of the man police have named as the prime suspect.
Investigators have released no photograph of Matthew Flores and have not described what he looks like, which could complicate public assistance in locating him. They have not said whether they recovered a weapon from the scene or identified a motive for the killings.
Cases like this one, where a suspect allegedly harms family members and then disappears, test the reach of American law enforcement in ways that straightforward domestic homicides do not. The involvement of the FBI and U.S. Marshals reflects the seriousness of the situation, but international fugitive cases are notoriously slow. A double-body discovery near Houston recently underscored how difficult these investigations become even when the suspect remains in the country.
Hector and Larissa Flores were, by every neighbor's account, a quiet couple in their sixties living in a quiet suburb. They were described as friendly. Their relatives had to call police just to check on them. What officers found was a blood-soaked house and two shallow graves.
Accountability in cases like the North Carolina killing of a missing woman came only after sustained law-enforcement pressure. The families of victims in these cases deserve the same relentless pursuit, no matter how far the suspect runs.
A couple in their sixties buried in their own backyard, and the man police say did it already across an international border. If the system cannot bring him back, it will have failed the two people who deserved its protection most.
