RESTON, Va. (7News) — Cameras inside a Fairfax County murder trial are a rarity, permitted only at a judge’s discretion under Virginia law. For many viewers, the last time courtroom proceedings here were broadcast wall-to-wall was during the Johnny Depp-Amber Heard defamation trial in 2022 — a high-profile civil case that drew international attention.
Now, cameras are again rolling as jurors hear testimony in the double-murder trial of Brendan Banfield, a former FBI agent accused of conspiring with the family’s au pair to kill his wife, Christine Banfield, and another man, Joseph Ryan.
Day 2 of testimony marks a pivotal moment, as jurors begin weighing emotionally charged eyewitness accounts against physical and digital evidence prosecutors say tells its own story.
The prosecution’s case hinges heavily on the testimony of Juliana Peres Magalhaes, the Banfields’ former au pair, who has admitted to her role in the killings and is cooperating with authorities as part of a plea agreement. She has pleaded guilty to a lesser charge and faces a recommended sentence of time served.
Magalhaes entered the Virginia courtroom on Tuesday, ready to testify about what she witnessed in the 2023 double murder inside a Reston home.
Her eyes did not meet those of Brendan Banfield, the man whom prosecutors said convinced Magalhaes to help him carry out the murder of Banfield’s wife, Christine, alongside luring and killing another man inside his home.
For two hours, prosecutors questioned Magalhaes, Banfield’s au pair, on her role in the plot and her alleged affair with Banfield. Those questions are expected to continue on Wednesday as she takes the witness stand again at the start of the day and faces questions from the defense.
BANFIELD DOUBLE MURDER TRIAL | Banfield trial begins with opening statements, au pair testimony
Prosecutors allege the killings were the result of months of planning fueled by an extramarital affair between Banfield and Magalhães. They say the pair created fake online accounts to lure Ryan to the family’s home, staging the scene to look like a violent home invasion.
Prosecutors and Banfield’s defense team both provided opening statements before several back-to-back testimonies from officers, a Fairfax County 9-1-1 records keeper, and the medical examiner, before Magalhaes took to the stands.
Banfield’s defense spent the bulk of his opening statement challenging Magalhaes’ credibility, pointing out how many times the prosecution offered her a plea deal she turned down before accepting her current one.
Magalhaes claimed she began an affair with Banfield in August 2022, and in October, Banfield began discussing how he wanted to “get rid of” Christine and marry Magalhaes. When asked about a divorce, Magalhaes told the court that Banfield said the process would cost too much money and that he didn’t want to split child custody.
Banfield convinced Magalhaes to learn how to fire a gun, and the two worked together to create a fake account under Christine’s account to lure a man to the house, the au pair said.
Once they found the right man, Joseph Ryan, they lured him to the house and began efforts to stage the incident as if Ryan were a home intruder, Magalhaes claimed.
She said Banfield changed his daily routine days prior, instructed Magalhaes to get a new phone and Apple ID, and told her to park in a different location on the day of the murders. The au pair said she told Christine she would be away from the house around the same time as the meetup.
After Ryan arrived at the house, the pair then quietly entered the house through the basement. Shortly after, Magalhaes said Banfield stabbed both Ryan and Christine and fatally shot Ryan.
She also testified that she witnessed Banfield repeatedly stab his wife, Christine, during the attack.
“Christine’s first reaction — that’s the first time I heard her say anything,” Magalhaes told jurors. “Then she yelled back at Brendan saying, ‘Brendan, he has a knife.’ That’s when Brendan first shot Joe.”
When asked where Christine Banfield was stabbed, Magalhaes replied simply:
“The neck.”
A lawyer for Banfield said in opening statements that it was Ryan, not Banfield, who killed Christine, but conceded his client and the au pair were having an affair.
The defense sharply disputes that version of events, arguing that investigators manipulated evidence and built their case around a cooperating witness with every incentive to lie.
Neama Rahmani, a former federal prosecutor, says jurors will ultimately have to decide whether Magalhaes is credible — or simply saying what prosecutors want to hear.
“I think the key evidence in this case is going to be the cooperating witness, Juliana, the Brazilian au pair, as well as the digital evidence connecting the two — their extramarital affair and then the setup in this case to make the murders of Christine and Joseph Ryan seem like self-defense,” Rahmani said.
Jurors are expected to see that clash play out directly in court. Prosecutors are set to finish their direct examination of Magalhães, after which Banfield’s defense attorney is expected to begin an aggressive cross-examination aimed at dismantling the state’s timeline and challenging her motives.
Day 2 of testimony resumes at 10 a.m. in Fairfax County Circuit Court.
