The Deadly Deception: How an Au Pair’s Affair Led to a Double Murder Plot

A Severe Sentence for a Calculated Crime

In a stunning conclusion to one of northern Virginia’s most disturbing criminal cases, 25-year-old Brazilian au pair Juliana Peres Magalhães received the maximum sentence of 10 years in prison followed by two years of probation for her role in a twisted double murder scheme. On Friday morning, Fairfax County Judge Penney Azcarate delivered a harsh rebuke along with the sentence, telling Magalhães that her actions were “deliberate, self-serving, and demonstrated a profound disregard for human life.” The judge made clear that she believed nothing less than incarceration and a lifetime of reflection was appropriate for the crimes committed. The severity of the sentence reflected the calculated nature of the plot that resulted in two deaths on February 24, 2023—those of 37-year-old Christine Banfield and 39-year-old Joseph Ryan. Judge Azcarate emphasized that Magalhães deserved no leniency, despite her cooperation with prosecutors, pointing to the devastating impact her actions had on the victim and the family left behind. The case, which has captivated public attention due to its shocking details involving an illicit affair, deception, and murder, is set to be featured in an upcoming “20/20” episode titled “The Au Pair, The Affair and Murder,” scheduled to air on ABC and streaming services in late February.

The Twisted Plot That Ended in Murder

The murders of Joseph Ryan and Christine Banfield were not crimes of passion or spontaneous violence, but rather the result of a carefully orchestrated plot hatched by Magalhães and her lover, former IRS agent Brendan Banfield. Investigators discovered that Magalhães and Banfield were engaged in an affair and had devised a sinister plan to eliminate Christine Banfield, Brendan’s wife. The scheme involved what prosecutors described as a “catfishing” operation, in which Banfield and Magalhães secretly created a profile pretending to be Christine on a social media platform dedicated to sexual fetishes. This fake profile was designed to lure an unsuspecting victim into their home under false pretenses. Joseph Ryan, a 39-year-old man who had no connection to the Banfield family, responded to the profile and engaged in communications with what he believed was Christine Banfield. Together, they discussed and planned a rape fantasy scenario that involved props like knives, chains, and rope. Ryan had no idea he was walking into a deadly trap when he arrived at the Banfield residence. The elaborate deception demonstrated the cold calculation behind the murders, as the couple manipulated an innocent person into becoming an unwitting participant in their murderous scheme.

The Deadly Day and the Cover-Up Story

When police arrived at the Banfield home on February 24, 2023, they encountered a scene that initially appeared to match the story told by Banfield and Magalhães. The pair claimed they had returned home to find Ryan, a complete stranger to them, in the act of stabbing Christine Banfield to death. According to their account, both Banfield and Magalhães fired shots at Ryan to stop the attack, with Magalhães admitting she fired the fatal second shot that killed him. This narrative was presented both in their 911 call and to the responding officers who arrived at the scene. For a time, it appeared the couple might have acted in defense of Christine. However, as the investigation progressed, detectives uncovered evidence that painted an entirely different picture. The discovery of the affair between Magalhães and Banfield, combined with evidence of the fake social media profile and the orchestrated nature of Ryan’s presence at the home, revealed the truth: this was not a case of intervention to save a life, but rather a premeditated double murder. The evidence suggested that both Christine Banfield and Joseph Ryan were victims of a plot designed to allow Banfield and Magalhães to be together while eliminating the obstacle of Banfield’s marriage.

Justice Unfolds: From Charges to Testimony

The path to justice in this case took several twists and turns. In October 2023, more than eight months after the murders, Magalhães was charged with second-degree murder in Ryan’s death, as she had acknowledged firing the shot that killed him. However, one year later, in a strategic move that would prove crucial to prosecuting Brendan Banfield, Magalhães accepted a plea deal with prosecutors. In exchange for pleading guilty to the lesser charge of manslaughter and agreeing to testify against Banfield, prosecutors promised to recommend only time served at her sentencing. As part of this agreement, Magalhães sat for nearly four hours of interviews with prosecutors, during which she largely confirmed the theory that detectives had developed about the scheme she and Banfield had carried out. Her cooperation proved essential when Brendan Banfield’s trial began in January. While Banfield maintained his innocence throughout the proceedings, Magalhães took the stand and testified against her former lover during his three-week-long trial. Banfield even took the unusual step of testifying in his own defense, attempting to counter the prosecution’s case. After two days of deliberations totaling nearly nine hours, the jury reached their verdict on February 2, finding Banfield guilty on all four counts: two counts of aggravated murder, one count of child endangerment, and possession of a firearm in commission of a felony. Despite prosecutors’ recommendation for leniency based on her cooperation, Judge Azcarate determined that Magalhães deserved the maximum sentence.

Heartbreaking Victim Impact Statements

The sentencing hearing on Friday morning was filled with raw emotion as family and friends of both Christine Banfield and Joseph Ryan gathered in the courtroom to face the woman who had helped orchestrate the deaths of their loved ones. Perhaps most poignant was the statement from Joseph Ryan’s mother, Deirdre Fisher, who joined the proceedings remotely from Florida. She shared the deeply personal detail that her son had been born just two days before Christmas, making the holiday especially meaningful for their family. Since his murder, Fisher revealed, she has been unable to take down her Christmas tree, which now sits beside the urn containing her son’s ashes. Each morning, she turns on the tree’s lights and says good morning to her son, and each night, she tells him she loves him as she turns the lights off. Fisher spoke of the milestones she would now never experience, including the opportunity to become a grandmother, and the painful moments when she instinctively reaches for the phone to call her son before remembering he can no longer answer. Ryan’s aunt, Sangeeta Ryan, delivered her statement in person, her words frequently interrupted by sobs as she described her nephew as “fun-loving and loved from the beginning,” someone who was “inquisitive, curious, smart, charming, and so dang talkative.” She spoke of his passion for animals and the environment, noting his habit of rescuing and adopting dogs, and his dedication to caring for his grandmother, who ultimately had to sell her home to escape the memories, grief, and media attention surrounding the tragedy. While acknowledging that Magalhães eventually told the truth, Sangeeta Ryan emphasized that this did not constitute heroism, noting that things “could have been a very different ending where Juliana saved two lives” had she not participated in Banfield’s plot.

Remorse, Reflection, and What Comes Next

During the sentencing hearing, Magalhães herself addressed the court with words of remorse, though they did little to sway Judge Azcarate’s decision. “I have caused pain that cannot be measured. I pray for forgiveness from the Benson family, and from the Joseph Ryan family,” Magalhães said, acknowledging that there was nothing she could possibly do to compensate for the losses she had caused. She described her actions as her biggest regret and a tragedy she would carry with her forever, admitting she could never undo the devastation she had created. Magalhães claimed she had lost herself in her relationship with Banfield but insisted she had changed during the three years she spent in jail awaiting trial and sentencing. Despite these expressions of remorse and her cooperation with prosecutors that proved instrumental in convicting Banfield, Judge Azcarate determined that the maximum sentence was appropriate given the calculated nature of the crimes. Notably, because Magalhães was only charged in connection with Joseph Ryan’s death, the judge ruled that prosecutors could not include victim impact statements prepared by Christine Banfield’s family members, leaving another dimension of grief unheard in the courtroom. As for Brendan Banfield, the man at the center of this deadly scheme, he faces an even grimmer future. Virginia abolished the death penalty in 2021, meaning that following his conviction on all counts, Banfield is facing life in prison without the possibility of parole. His sentencing hearing is scheduled for May 8, where he will learn his fate for orchestrating a plot that destroyed multiple families and ended two innocent lives in pursuit of his own selfish desires.