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Homicide

Woman pleads guilty to murdering best friend’s 6-week-old son, said she had compulsion to harm kids

A Pennsylvania woman pleaded guilty to third-degree murder for killing her best friend's 6-week-old infant son and was sentenced to 35 to 80 years in prison.

By URC · NEWS NewsroomPittsburgh, PAOctober 30, 2026 at 1:31 AM UTCUpdated October 30, 2026 at 3:23 AM UTC
Woman pleads guilty to murdering best friend’s 6-week-old son, said she had compulsion to harm kids
Photo: NBC News US

Full report

Case Summary

Case Type
Homicide
Incident Date
2024-06
Location
Pittsburgh, PA, Pittsburgh, PA
Investigating Agency
NBC News US
Suspect
Nicole Virzi
Suspect Age
32
Victim Count
2
Charges
capital murder, third-degree murder
Arrest Status
Arrested
Court Status
Guilty plea and sentenced
Case Status
Closed via plea agreement

A 32-year-old Pennsylvania woman admitted in a Pittsburgh court on Wednesday that she murdered her best friend's infant son, receiving a prison sentence of 35 to 80 years following a plea agreement.

Nicole Virzi, a doctoral student at the University of California San Diego, was visiting Pittsburgh and assisting her best friend, Savannah Roberts, with newborn twins when the fatal incident occurred in June 2024.

Incident Overview

In June 2024, parents Savannah Roberts and Ethan Katz took one of their newborn twin sons, Ari, to the hospital after discovering wounds on his body. Virzi had offered to look after the other twin, 6-week-old Leon Katz, while the parents were away. Late that night, Virzi contacted emergency services and claimed that the infant had fallen from a baby bouncer. The child was transported to a nearby children's hospital, where medical personnel pronounced him dead.

Investigators quickly determined that the severity of the injuries sustained by Leon was inconsistent with a short fall from a baby bouncer. Subsequent medical examinations concluded that the infant died from blunt force trauma to the head, and investigators determined that the injuries previously found on Ari were also inflicted by Virzi. Prosecutors stated that Virzi told investigators she had a persistent and uncontrollable compulsion to harm children, utilizing her trusted relationship with the family to gain access to the infants.

Suspect Information

  • Name: Nicole Virzi
  • Age: 32
  • Residence: Visiting Pittsburgh from California
  • Background: University of California San Diego doctoral student and close friend of the victim's mother

Victim Information

The victims include 6-week-old Leon Katz, who died from blunt force trauma, and his twin brother Ari Katz, who sustained non-fatal injuries prior to the homicide. The infants' mother, Savannah Roberts, described the profound psychological impact of the tragedy in a letter to Allegheny County Common Pleas Judge Jill E. Rangos, noting that her trust in humanity and personal sense of safety have been permanently altered.

Police Response

Pittsburgh police responded to the emergency call placed by Virzi late at night regarding the injured infant, securing the scene and initiating an immediate medical transport to a children's hospital before taking Virzi into custody.

Investigation

Detectives from the Pittsburgh police department led the inquiry, working alongside prosecutors from the Allegheny County District Attorney's Office to review medical examiner findings, hospital reports, and statements provided by the suspect.

Evidence Collected

  • Medical examiner findings on blunt force trauma to the head
  • Physical trauma evidence documented on both twin infants
  • Statements provided by the suspect to investigators
  • Hospital treatment records for the infant victims

Arrest Details

Following the medical determination that Leon's injuries could not have resulted from an accidental fall, Pittsburgh police took Virzi into custody. She was initially charged with capital murder and faced the possibility of the death penalty before entering a plea agreement.

Charges Filed

  • Capital Murder: A severe felony charge alleging premeditated or intentional killing, which originally carried the possibility of the death penalty prior to the plea negotiation.
  • Third-Degree Murder: A felony charge involving malice and a disregard for human life, resulting in Virzi pleading guilty and receiving a sentence of 35 to 80 years in prison.

Court Information

  • Court Name: Allegheny County Common Pleas Court
  • Presiding Judge: Judge Jill E. Rangos
  • Case Number: Not released
  • Next Hearing: None, as the case was concluded with sentencing

Statements from Authorities

According to a statement issued by the Allegheny County District Attorney's Office regarding the resolution of the case, prosecutors noted: Although this office was committed to pursuing this case to trial and its ultimate conclusion, after continued and on-going consultation with the family and considering the best interest of the community and its protection we agreed to offer the above plea and sentence.

Local legal analyst and criminal defense attorney Phil DiLucente remarked to reporters on the unusual nature of the proceeding, stating that the defendant's actions represented a bizarre and premeditated offense that would make parole exceptionally unlikely.

Public Safety Information

Public safety and child welfare agencies encourage anyone struggling with thoughts of harming children or experiencing a severe mental health crisis to seek immediate help. Professional support and confidential crisis intervention are available nationwide by calling or texting 988, or by contacting local emergency services at 911.

What Happens Next

With the acceptance of the plea agreement and the imposition of the 35 to 80 year prison sentence by Allegheny County Common Pleas Judge Jill E. Rangos, criminal proceedings in the trial court are concluded, and the defendant will begin serving her sentence in state correctional custody.