Who is Juliana Peres Magalhães & Where Is She Now? 2026 Update & Profile

Juliana Peres Magalhães is the Brazilian au pair whose role in the Virginia double murder case became central to both the investigation and the prosecution. She was employed by the Banfield family in Herndon, Fairfax County, where she lived in the home and helped care for the couple’s young daughter. At the time of the events, she was in her early twenties and had come to the United States as part of an au pair program.

Her position within the household placed her in close daily contact with both Christine and Brendan Banfield. According to the case materials, that proximity developed into a secret relationship with Brendan Banfield in 2022. What began as a personal relationship later became a key focus for investigators, who examined how that connection evolved into involvement in a criminal plan. Prosecutors later argued that Magalhães was not a peripheral figure but an active participant whose actions helped carry out the events that led to two deaths.

• “Temptation”: Dateline Examines the Banfield Double Murder Case April 3 2026
• Who is Brendan Banfield & Where Is He Now? 2026 Update & Profile
• Who Was Christine Banfield & What Happened to Her? 2026 Update & Profile
• Who Was Joseph Ryan & What Happened to Her? 2026 Update & Profile

The Affair and Her Role in the Alleged Plot

The relationship between Magalhães and Brendan Banfield formed the foundation of the prosecution’s case. Evidence presented in court showed that the two were involved in an affair while she was working in the home. Prosecutors argued that this relationship led to discussions about Banfield’s desire to end his marriage without facing divorce proceedings or custody issues. That alleged motive became a central part of the state’s theory.

According to the materials provided, Magalhães assisted in creating a fake online identity in Christine Banfield’s name on FetLife. Through that account, Joseph Ryan was contacted and persuaded to come to the Banfield home under the belief that he was meeting Christine for a consensual encounter. Prosecutors argued that this step was critical to the plan, as it brought an outsider into the home who could later be blamed for the violence. At trial, Magalhães admitted to her involvement in these actions and described how the deception unfolded.

What Happened on the Day of the Killings

On February 24, 2023, Magalhães was inside the Banfield home when the killings took place. Police later found Christine Banfield fatally stabbed and Joseph Ryan shot to death in an upstairs bedroom. In the immediate aftermath, Magalhães and Brendan Banfield told authorities that Ryan had entered the home and attacked Christine, and that he was shot in self-defense.

That account later changed as the investigation progressed. According to her testimony and statements cited in the materials, Magalhães admitted that the events were not a spontaneous act of self-defense. She told the court that Banfield stabbed his wife and shot Ryan, and that she also fired a shot that contributed to Ryan’s death. She acknowledged that the plan had been to present the scene as a home invasion. Her statements became a turning point in the case, shifting the narrative from a defensive shooting to a coordinated act.

Arrest, Plea, and Cooperation with Prosecutors

Magalhães was arrested in October 2023, several months after the killings, and initially faced charges that included second-degree murder. For a period, she did not provide a full account to investigators. As her own trial date approached, she agreed to cooperate with prosecutors. In October 2024, she pleaded guilty to a reduced charge of involuntary manslaughter in the death of Joseph Ryan.

As part of that plea agreement, she agreed to testify against Brendan Banfield. Her testimony became one of the most important elements of the prosecution’s case at his trial in 2026. She described the planning, the use of the fake online account, and the events inside the home. Prosecutors credited her cooperation as essential to securing Banfield’s conviction, as it provided a direct account from someone involved in the crime.

Sentencing and the Court’s Assessment

Magalhães was sentenced in February 2026 following Banfield’s conviction. Although prosecutors recommended a sentence of time served based on her cooperation, the court rejected that recommendation. Judge Penney Azcarate described the case as the most serious manslaughter scenario the court had encountered and emphasized that the crime could not have taken place without her participation.

She received a sentence of 10 years in prison, with two years suspended. During the sentencing hearing, Magalhães addressed the families of the victims and expressed remorse for her actions. The court acknowledged her cooperation but concluded that her role in luring Ryan to the home and participating in the events required a significant custodial sentence. The judge made clear that cooperation did not erase responsibility for what had occurred.

Where Juliana Peres Magalhães Is Now

Based on the information provided, Juliana Peres Magalhães is currently serving her sentence in prison following her February 2026 conviction and sentencing. She has been in custody since her arrest in October 2023, and that time is expected to be credited toward her overall sentence. Reports cited in the materials suggest that, with credit for time served and standard reductions for good behavior, the time she ultimately spends in custody may be shorter than the full sentence imposed by the court.

There is no indication in the provided materials that she has been released. As such, the most accurate current status is that she remains incarcerated in the United States, serving a sentence for her role in the killing of Joseph Ryan and her involvement in the events that led to the death of Christine Banfield.

A Defining Role in a High-Profile Case

Magalhães’ role in the case has been widely discussed because it combined elements of personal relationship, deception, and direct involvement in a violent crime. Her position as an au pair placed her inside the family’s private life, and prosecutors argued that trust was exploited in a way that had severe consequences. Her later cooperation with authorities added another dimension, as it helped bring forward details that shaped the outcome of the trial.

Dateline NBC’s Temptation includes previously unseen footage of her interactions with police, offering a closer look at her behavior in the immediate aftermath of the killings. Those recordings, along with her courtroom testimony, form a detailed record of how her role evolved from a participant in the events to a key witness in the prosecution of Brendan Banfield.