The Brendan Banfield murder conviction is the subject of a new episode of A&E’s Killer Investigations, which examines how a former IRS criminal investigator orchestrated a double killing inside his Herndon, Virginia home and was ultimately sentenced to life in prison without parole.
Banfield called 911 on 24 February 2023 claiming he had shot an intruder who was attacking his wife, Christine Banfield, aged 37. When Fairfax County police arrived, they found Joseph Ryan dead from multiple gunshot wounds. Christine was critically injured and died at hospital shortly afterwards.
The family’s Brazilian au pair, Juliana Peres Magalhaes, initially corroborated Banfield’s account, telling officers she had witnessed a stranger attack Christine before Banfield intervened. Body-camera footage captured her description: ‘Brendan said please drop the knife, drop the knife because he had a knife and then he said, drop the gun to Brendan, they were yelling. I couldn’t understand. It was super fast.’
The Catfishing Plot Behind the Brendan Banfield Murder Conviction
Homicide investigators quickly found inconsistencies. A trail of digital messages on FetLife, a BDSM fetish website, led detectives to an account called ‘Anastasia9’ that appeared to belong to Christine Banfield. The messages, exchanged with Ryan, discussed acting out a violent fantasy in the Banfield bedroom. According to NBC4 Washington, Magalhaes testified at trial that Banfield had created the fake profile himself and that both of them used it to message Ryan.
Christine’s friends and family said the messages were wholly out of character for the respected nurse and mother. Ryan’s mother, Deirdre Fisher, said she knew her son was interested in role play but was adamant he acted only with consent. ‘Joe was about consent and I knew he was about role play. He was a good person. And he wasn’t just this guy who had sexual kinks. So I knew these things were untrue,’ Fisher said.
Detectives also found social media photographs of Banfield and Magalhaes sitting intimately together in a bathtub. After Christine’s death, Magalhaes had moved into the master bedroom and begun hanging her clothes in Christine’s closet. Investigators concluded the pair had been conducting an affair and had used the catfishing scheme to lure Ryan into a plot designed to kill Christine and frame him for the killing.
Guilty Plea, Trial, and Sentencing
According to a Fairfax County Commonwealth’s Attorney press release, Magalhaes, then aged 24, had originally been arrested on 19 October 2023 and charged with second-degree murder and use of a firearm in the commission of a felony. She entered a guilty plea to manslaughter on 29 October 2024 and received the maximum sentence of 10 years under that agreement, as confirmed by NBC4 Washington.
A grand jury separately indicted Banfield on 16 September 2024 on four counts of aggravated murder and one count of use of a firearm in the commission of a felony, according to the same press release issued by Commonwealth’s Attorney Steve Descano.
Having agreed to plead guilty, Magalhaes became the Commonwealth’s star witness. She testified that when she asked Banfield whether he wanted a divorce, he replied: ‘I don’t want to share my custody. It’ll be easier if she was not in the picture.’
Banfield took the stand in his own defence and rejected her account outright. ‘I think that it’s an absurd line of questioning for something that is not serious, that were, that a plan was made to get rid of my wife. That is absolutely crazy,’ he told the court.
The jury was unconvinced. Fox 5 DC reports that the sentencing judge described the crimes as ‘unfathomable’ before imposing life without parole. ABC News notes that Banfield faced a mandatory life sentence and retains the right to appeal his conviction.
Christine’s sister, Danielle Hawker, addressed the court at sentencing: ‘I will forever carry both the grief of losing her too soon and the gratitude of having loved her for 37 years and being loved by, in return.’
Fisher also spoke at both sentencing hearings. Of Banfield, she said: ‘I believe it’s good for him to live the rest of his life thinking about the crime that he committed. And his legacy will just be prison and that he was a bad murderer.’
The episode, titled ‘Sex, Lies and Murder,’ features Fisher’s interview and is now airing on A&E as part of the Killer Investigations series. NBC4 Washington has followed the case since the sentencing of both defendants. Any appeal by Banfield would be the next legal development to watch in this case.
