Au Pair, Affair, and Murder: The Banfield Case

On February 24, 2023, in Fairfax County, Northern Virginia, the lives of two people ended in violence orchestrated by a wealthy married man and carried out with the help of his Brazilian au pair lover. The crime exposed a web of deception that began months earlier, rooted in an illicit affair and a husband's desperation to escape his marriage.

Juliana Peres Magalhães arrived in the United States in October 2021 to work as an au pair for the Banfield family. She was 21 years old. Around ten months into her employment, she began a sexual relationship with her employer, Brendan Banfield. The attraction would prove fatal.

Banfield expressed his desire to marry Magalhães and start a family with her, but he faced a significant obstacle: his wife, Christine Banfield. Rather than pursue divorce, Banfield rejected that path—primarily because, as he told Magalhães, his wife would receive a substantial financial settlement and gain custody of their 4-year-old daughter. In his mind, eliminating his wife was preferable to the financial and custodial consequences of legal separation.

To execute the plan, Banfield turned to the internet. He created a fake profile on a sexual fetish website, impersonating his wife Christine. Using this deceptive identity, he lured Joseph Ryan—a stranger—to their home under the guise of a consensual roleplay scenario. The arrangement, according to the lure, would involve restraints and a knife. It was an elaborate trap.

On the morning of February 24, 2023, Ryan arrived at the Banfield residence, unsuspecting. What followed was brutal and calculated. Brendan Banfield shot Ryan in the head. As Ryan struggled, still alive and moving, Banfield ordered Magalhães to finish him. She shot Ryan in the chest.

The couple then called 911. When investigators arrived, they found the 4-year-old daughter in the home, unharmed but aware of Magalhães's presence in her family's life. Notably, the child referred to the au pair as "Mommy." Among the evidence collected was a photograph of Brendan and Juliana together—a visual confirmation of their relationship.

Magalhães initially participated in the cover-up, but eventually her conscience prevailed. She confessed to her role in the crimes and agreed to testify against Banfield. In January 2026, she took the stand and provided detailed testimony about the affair, Banfield's motive, and the planned execution of the murders. She explained her decision to finally turn against her lover, breaking her silence about the conspiracy.

On February 13, 2026, Magalhães was sentenced to a maximum of 10 years in prison after pleading guilty to second-degree murder. Her cooperation with prosecutors proved valuable in building the case against Banfield, who faced trial as of January 2026. His sentencing was scheduled for early May 2026.

The Banfield case stands as a stark reminder of how obsession, financial motive, and moral compromise can escalate into premeditated violence. A young woman far from home, entangled in an affair with a married employer, became complicit in murder. A husband's refusal to accept the consequences of divorce led to the deaths of two people. And a 4-year-old girl lost her mother to the violence of the adults around her.

**Sources:** https://www.youtube.com/watch?v=QDnJC87zAMM https://www.youtube.com/watch?v=7Ybia9AvhVc https://www.youtube.com/watch?v=kABgvaS1aUc https://www.youtube.com/watch?v=Wm7CcT5a1Lg https://www.youtube.com/watch?v=8pUlxgEbrog