NYC Nurse’s Father Reportedly Heard Fatal Gunshot While on Phone With Daughter During Bronx Murder-Suicide

Juan Cornelio Diaz and Andrea Cantarini pose with their children in this 2024 Instagram photo. Diaz killed Cantarini before taking his own life.Instagram/Jose Cornelio

A New York City nurse was fatally shot inside her Bronx apartment while speaking to her father on the phone, with investigators reporting that he heard the gunfire that ended his daughter’s life.

Andrea Cantarini, 37, was killed Tuesday night, November 3, 2026, in what police believe was a domestic dispute involving her boyfriend, Juan Cornelio Diaz, 38, a federal officer assigned to John F. Kennedy International Airport.

The incident unfolded at an apartment on Blackstone Avenue in the Riverdale neighborhood of the Bronx at approximately 9 p.m.

According to police and sources cited by the New York Post, Cantarini’s father was on the phone with his daughter when the shooting occurred.

Father Heard Gunfire During Daughter’s Final Phone Call

One of the most disturbing details to emerge from the investigation concerns the telephone conversation between Cantarini and her father.

The 37-year-old nurse was reportedly speaking with him when the situation inside her apartment turned violent.

Sources said her father heard the gunshots over the phone as Diaz allegedly shot her.

The call placed him in the devastating position of hearing the incident unfold without being physically present to intervene.

Authorities have not publicly disclosed the full contents of their conversation or whether Cantarini had been able to explain what was happening before the gunfire.

The precise sequence of events leading up to the shooting remains under investigation.

Boyfriend Was a Federal Officer Working at JFK Airport

Police identified the suspected gunman as Cantarini’s boyfriend, Juan Cornelio Diaz, 38.

Diaz worked as an officer with U.S. Customs and Border Protection and was stationed at John F. Kennedy International Airport.

Investigators believe he shot Cantarini in the head during an apparent domestic dispute inside the apartment.

Diaz was subsequently found with a gunshot wound to his own head.

Authorities are treating the incident as an apparent murder-suicide.

The report did not establish what sparked the confrontation or whether there had been previous incidents involving the couple.

Family Photo Emerges Following Tragedy

As details of the shooting emerged, a photograph shared on social media offered a glimpse into the couple’s family life before the tragedy.

The image, posted in 2024, showed Cantarini and Diaz posing with children and other family members in front of yellow and black balloons.

The family photograph stands in stark contrast to the events now being investigated by New York City police.

Cantarini’s death has drawn attention not only because of her work as a nurse but also because of the circumstances in which her father reportedly became aware of the violence.

Police have not released further details about the children pictured or their circumstances following the incident.

Investigators Examine Apparent Domestic Dispute

The NYPD believes the shooting stemmed from a dispute between Cantarini and Diaz.

However, officials have not publicly identified a specific motive or explained what occurred immediately before the fatal gunfire.

The case also raises questions about the circumstances surrounding a federal law enforcement officer’s involvement in a domestic shooting.

At the time of the initial report, authorities had not disclosed whether the firearm involved was issued for official duties or privately owned.

Those details remain unconfirmed.

Police have also not released a complete timeline of the couple’s final moments.

A Family Left Devastated by a Phone Call

For Cantarini’s relatives, the tragedy carries an especially painful detail.

Her father was reportedly speaking with her at the very moment the shooting occurred, turning an ordinary telephone conversation into an experience no parent could have anticipated.

The case has left investigators examining the circumstances of the apparent murder-suicide while the family confronts the sudden loss of a daughter.

As the investigation continues, authorities have yet to explain what triggered the confrontation inside the Riverdale apartment.

The shooting remains a developing case, with additional information expected as police establish a fuller account of what happened that night.