Affluent Virginia suburb rocked as trial begins for ex-federal agent husband in nanny love-triangle murders

Opening statements are expected to statesman Tuesday successful the proceedings of Brendan Banfield, a erstwhile IRS peculiar cause who is accused of orchestrating a grisly treble execution to conceal an matter with his family's au pair.

Twelve jurors and 4 alternates were seated Monday arsenic the proceedings begins, FOX 5 reported.

Banfield is charged with aggravated execution successful the February 2023 killings of Christine Banfield and Joseph Ryan astatine the Banfields’ location successful the idyllic Washington, D.C., suburb of Herndon, Virginia.

According to tribunal records, Banfield and then-22-year-old Brazilian au brace Juliana Peres Magalhães were contiguous erstwhile his woman and Ryan were killed successful the home's superior bedroom. At the time, the au brace told investigators they had discovered Ryan — a alien — stabbing Banfield's woman and had some opened occurrence to halt the intruder.

Brendan Banfield is charged with 4 counts of aggravated execution and usage of a firearm successful committee of a felony.  (Fairfax Co. PD)

AFFLUENT VIRGINIA HUSBAND, NANNY CHARGED WITH MURDERS IN MANSION LOVE TRIANGLE

Prosecutors, however, allege a much calculated plot. They accidental that Banfield and Magalhães lured Ryan to the location and staged the country to marque the homicides look similar an enactment of self-defense.

Prosecutors person said Banfield was impersonating his wife, Christine, successful an online relationship connected a fetish website. Prosecutors said the hubby lured Ryan to the couple’s Herndon-area location arsenic portion of his crippled to termination his wife.

"It is simply a mentation successful hunt of facts alternatively than a bid of facts supporting a theory," John Carroll, Banfield’s attorney, antecedently said.

A framed photograph of Brendan Banfield and Juliana Magalhaes and the mistress's lingerie were recovered successful the country wherever the treble homicide occurred, according to prosecutors. (Fairfax County Commonwealth Attorney's Office)

VIRGINIA AU PAIR MURDER: FETISH PLOT, AFFAIR, GUN RANGE TIED TO DOUBLE HOMICIDE AT HOME, PROSECUTORS REVEAL

When constabulary initially responded to a 911 telephone from the residence successful February 2023, they recovered Christine with stab wounds to the cervix and Ryan with fatal gunshot wounds successful the upstairs chamber of the home.

Authorities took Christine to the hospital, wherever she was aboriginal pronounced dead, Fairfax County Police Department Chief Kevin Davis said. Officials recovered a weapon and 2 guns from the scene.

The relationship utilized to summon Joseph Ryan was made and utilized connected slain parent Christine Banfield's laptop – but investigators person questioned whether she was the 1 communicating connected the account. (Christine Banfield connected Facebook)

AFFLUENT VIRGINIA SUBURB ROCKED BY MANSION MURDER MYSTERY AS NANNY FACES TRIAL

Banfield has pleaded not blameworthy successful the case, but Magalhães, a Brazilian national, pleaded blameworthy to manslaughter successful precocious 2024.

She is expected to attest against Banfield during the proceedings and supply a first-hand relationship of the alleged plot.

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Fairfax County constabulary initially responded to the treble homicide successful the 13200 artifact of Stable Brook Way successful Herndon connected Feb. 24, 2023. (FOX 5 DC)

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If convicted, Banfield is expected to look beingness successful prison. Fox News Digital has reached retired to Banfield’s attorney, John Carroll, for comment.

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The proceedings is expected to past 4 weeks. Court sessions volition statesman astatine 10 a.m. each time and tally Monday done Thursday, according to tribunal administrators.

Fox News Digital's Audrey Conklin and the Associated Press contributed to this report.