Au Pair Affair Trial Of Brendan Banfield: Nick Barreiro Takes The Stand — Audio/Video Analyst Back on the Stand — Defense Pushes the Forensics Harder
Hidden Killers With Tony Brueski | True Crime News & Commentary
True Crime Today
3.3 • 908 Ratings
🗓️ 29 January 2026
⏱️ 20 minutes
🧾️ Download transcript
Summary
Nick Barreiro, Audio/Video Forensic Analyst, testified today in the Brendan Banfield murder trial. Banfield, a former IRS agent, is charged with four counts of aggravated murder in the February 2023 deaths of his wife Christine Banfield and Joseph Ryan at their Herndon, Virginia home.
Prosecutors allege Banfield plotted the killings with the family's Brazilian au pair, Juliana Peres Magalhães, with whom he was having an affair. Magalhães has pleaded guilty to manslaughter and is expected to testify against Banfield. The defense maintains digital evidence does not support the state's catfishing theory.
#BrendanBanfield #AuPairAffair #MurderTrial #TrueCrime #Testimony #ChristineBanfield #JosephRyan #FairfaxCounty #HiddenKillers #Breaking
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Transcript
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| 0:00.0 | You're listening to the Aupair Affair Murder Trial of Bratton Vanfield from True Crime today in the Hidden Killers podcast. |
| 0:08.0 | Now, back to the courtroom. |
| 0:11.2 | Yes, Your Honor. |
| 0:12.3 | Good afternoon. Mr. Barrero. This is John Carroll. |
| 0:17.1 | Hi, John. |
| 0:18.7 | How are you? |
| 0:21.9 | I'm good, thank you. |
| 0:23.2 | I'm going to try to start where we left off on the previous testimony. |
| 0:29.5 | And I believe we were talking about your methodology. |
| 0:34.9 | Yes, sir. |
| 0:36.1 | Now, you reference in your methodology critical listening waveform and spectrographic analysis? |
| 0:45.5 | Yes, sir. |
| 0:46.6 | Can you please explain to the ladies and gentlemen of the jury what that is? |
| 0:53.1 | Yes, so critical listening is just a detailed, repeated auditory review of the evidence. |
| 1:03.3 | It's using high-quality professional headphones on a forensic workstation and just reviewing the evidence and is detailed away as possible |
| 1:14.4 | with the ears. |
| 1:16.8 | And that normally goes hand in hand with the waveform and spectrographic analysis, which is |
| 1:23.8 | the visual representation on the screen of the audio that we are hearing through the |
| 1:32.3 | ears. |
| 1:32.6 | And the waveform is the squiggly line that everybody's familiar with. |
| 1:38.5 | The spectrogram includes the frequency or the pitch of the individual frequencies that are present in the file |
| 1:49.7 | instead of the just the amplitude of the sound wave in the waveform you get the amplitude |
... |
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