
By Dana Whitfield. Feb 9, 2026
A Virginia jury found a former IRS agent guilty of murdering his wife and another man in an elaborate plot involving deception, an affair, and the family’s au pair. The verdict against Brendan Banfield capped a trial that stunned a Fairfax County suburb and revealed a carefully constructed plan that left two people dead inside a family home. Prosecutors said the case was rooted in betrayal and manipulation rather than a momentary loss of control.
Banfield was convicted of aggravated murder for the February 2023 killings of his wife, Christine Banfield, and Joseph Ryan. Jurors rejected his claim that the shootings were an act of self-defense during a sudden confrontation. The decision followed weeks of testimony detailing how investigators believe the encounter was staged.
According to prosecutors, Banfield worked with the family’s Brazilian au pair, with whom he was having an affair, to lure Ryan to the Banfield home under false pretenses. Ryan, who had no known connection to Christine Banfield, was told he was coming to assist with a personal matter. Instead, authorities said, he was drawn into a deadly setup.
Once inside the home, prosecutors said Banfield shot Ryan and then killed his wife, later attempting to portray the scene as a justified response to an intruder. Investigators testified that the evidence did not support that narrative. They said the physical scene, digital records, and witness statements pointed to planning and coordination rather than panic.
Central to the case was testimony about Banfield’s relationship with the family’s au pair, who prosecutors said played a key role in the plot. Authorities alleged that she communicated with Ryan and helped arrange his visit, unaware at first of the full scope of Banfield’s intentions. Her involvement exposed a hidden relationship that upended the family’s public image.
During the trial, jurors heard how the affair created a web of secrecy inside the household. Prosecutors argued that Banfield exploited trust and authority to manipulate those around him. The au pair ultimately cooperated with investigators, and her testimony became a pivotal element in the state’s case.
Banfield’s defense centered on the claim that he acted to protect himself and his family. Prosecutors countered that assertion by highlighting inconsistencies between his account and the evidence. They pointed to the positioning of the victims, forensic findings, and communications leading up to the killings as proof of premeditation.
Investigators also emphasized that Banfield’s young daughter was inside the home at the time of the shootings, a fact that underscored the recklessness of the plan without exposing identifying details. Prosecutors said the presence of a child heightened the gravity of the crimes and contradicted any claim of a spontaneous defensive act.
The verdict brought a measure of resolution to a case that had haunted the Fairfax County community for nearly three years. Friends and neighbors described Christine Banfield as a devoted mother whose life ended through profound betrayal. Joseph Ryan’s death, prosecutors said, was equally senseless, as he was drawn into a situation he could not have anticipated.
Banfield now faces the prospect of spending the rest of his life in prison, with sentencing to follow. The case has become a stark example of how hidden relationships and calculated deception can lead to irreversible harm. As the courtroom emptied after the verdict, the focus returned to the two lives lost and the enduring impact on the family left behind.
References: AP News | NBC Washington
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