Orange County detectives say 63-year-old Ivan Montiel Roa fatally stabbed his 17-year-old twins inside their Orlando apartment, then died by suicide in what authorities describe as a murder-suicide. The Orange County Sheriff’s Office laid out that conclusion after deputies found the three dead following a neighbor’s 911 wellness call.

Carlo Montiel Infantino and Melanie Montiel Infantino were discovered in the living room of the family’s unit at Courtney Chase Apartment Homes. Both teens had multiple stab wounds. Montiel Roa was found dead in the master bedroom.

The legal posture is grim and final. No charges will move forward because the suspected attacker is dead. Still, the case lands hard on public safety questions that matter to families, first responders, and anyone who expects police work to document what happened when a household collapses into violence. Similar domestic devastation has stunned other communities, including a Montana family massacre that left multiple relatives and children dead.

The Orlando Sentinel reported the sheriff’s office announcement and the scene details tied to that release. Officials said a concerned neighbor called 911 after not seeing the family for about a week. Deputies responded on Wednesday and found the bodies.

What detectives say happened

In a Friday news release, the Orange County Sheriff’s Office stated its working conclusion in plain terms.

The agency said detectives believe the father killed both teens, then took his own life.

"At this time, detectives believe Ivan murdered Carlo and Melanie and then committed suicide,"

That is the official claim on the sequence. Investigators have not publicly detailed the exact time of the deaths. They also have not described the means by which Montiel Roa killed himself. Those points remain outside what the sheriff’s office put into the public record in the material reported.

What has been confirmed is blunt. Two 17-year-olds were stabbed to death in the living room. Their father was found dead in the master bedroom of the same Orlando apartment. Three people died. No arrest followed, because the man detectives name as the attacker did not survive.

Family annihilation cases force the same hard look at warning signs, household stress, and how quickly violence can erase an entire home, as in a Westwood apartment case treated as a suspected murder-suicide.

How the scene came to light

The discovery did not start with a scream for help from inside the unit. It started with absence.

A neighbor noticed the family had not been seen for about a week and called 911 for a wellness check. That call brought deputies to Courtney Chase Apartment Homes on Wednesday. Inside, they found the twins and their father dead.

Wellness checks are routine tools. They become catastrophic when officers open a door and find a completed attack. Here, the neighbor’s concern ended with a triple fatality and a detectives’ finding of murder followed by suicide.

Authorities have not publicly named the neighbor. They have not released a full forensic inventory in the reporting available from the sheriff’s announcement, including autopsy results or a recovered weapon list. Investigators will need to complete those ordinary death-investigation steps even when the suspected offender is deceased.

Other recent family death cases show how quickly parents can land at the center of a child fatality probe, including parents arrested after a nonverbal five-year-old was found dead in a South Carolina waterway.

Family background and recent upheaval

Public records and family materials sketched a household already marked by loss. The twins’ mother, Montiel Roa’s wife, died in June, according to public records referenced in the coverage. Her obituary said the family came from Venezuela.

Montiel Roa had worked as a realtor, based on his Facebook activity. He also had a construction business that was dissolved on Sept. 25. The business name was not provided in the reported record.

None of those facts is presented by authorities as a proven motive. Detectives have not publicly stated why the attack happened. Motive remains unconfirmed in the official account.

What the timeline does show is stacked disruption: a mother’s death in June, a business dissolution in late September, and then a deadly apartment scene discovered after the family went unseen for about a week.

Custody fights and parental breakdowns have driven other child-killing allegations in recent coverage, among them a New York case in which a mother was accused of shooting her 11-month-old son during a custody dispute.

Online posts under fresh scrutiny

Montiel Roa’s Facebook history is now part of the public narrative around the case. In December 2025 he posted a line that appeared to quote the film “The Dark Knight.”

"Introduce a little anarchy, alter the established order and everything turns into chaos. I am an agent of chaos,"

The Orlando Sentinel also reported that he reposted conspiracy theories and “new world order” sentiments. Those other posts were not quoted word for word in the account. Investigators have not said whether any online material factors into their belief about the killings.

Online rhetoric is not a conviction and not a charge. It is context readers will weigh while detectives finish a death investigation that cannot end in a courtroom trial of the father.

Political reaction near the apartment complex

Florida Rep. Rita Harris lives near Courtney Chase Apartment Homes and issued a public response to the deaths. Her comments focused on the scale of the loss and on the burden carried by the people who walk into such scenes.

Harris said the tragedy defies easy explanation.

"There are no words that can make sense of a loss like this,"

She also pointed to first responders and deputies who process the aftermath.

Harris added, “I am also thinking of the first responders and law enforcement officers who carry the weight of what they encounter in service to our community.”

That is the institutional layer conservatives watch closely. When a father is believed to have slaughtered his teenage children and then killed himself, the public still expects clean police work, clear statements, and respect for the officers who document the dead.

High-profile parental murder charges elsewhere, including an Illinois mother charged with murder after her 2-year-old son was killed, keep the same pressure on prosecutors and police to separate allegation, evidence, and proof.

What remains unresolved

The sheriff’s office has given a bottom-line theory: murder of the twins, then suicide by the father. It has not released a full public package on every investigative question.

Authorities have not publicly confirmed the precise calendar date and clock time when the three died. They have not described how Montiel Roa ended his own life. No public results have been released in the reported material about autopsy findings, toxicology, or a complete weapons inventory.

Investigators will need to pin down time of death, reconstruct the order of wounds, and close out the suicide manner with forensic support. Even without a living defendant, those steps matter for the official record and for any remaining administrative findings.

The New York Post’s account of the Orange County case tracks the same detectives’ belief that the father killed Carlo and Melanie before dying by suicide, matching the sheriff’s release quoted in Florida coverage.

Stakes beyond one apartment

Two teenagers are dead. Their father is dead. A neighbor’s wellness call became a triple fatality scene in an ordinary Orlando complex. Detectives say the man who should have protected the twins instead stabbed them and then killed himself.

That is the law-and-order core. Households can hide danger until absence itself becomes the alarm. Deputies still have to enter, identify the dead, and state what the evidence supports. Families still need a record that does not flinch from naming the attacker when the facts support it.

Rep. Harris’s second point also holds. First responders carry scenes like this long after the press release hits. Clear official language helps the public understand the finding without turning the dead into props for speculation that detectives have not endorsed.

Montiel Roa’s December 2025 chaos quote will circulate because it is stark. It does not replace evidence. The Orange County Sheriff’s Office has already given the operative claim: detectives believe Ivan murdered Carlo and Melanie and then committed suicide.

When a father is accused by detectives of destroying his own children, the public standard is simple. Tell the truth about the bodies, finish the forensics, and refuse to look away from evil done inside the home.