Forensic Audio Expert: 911 Call Sound Consistent With Dog, Not Human | Banfield Trial

Описание: A 1.4-second groaning sound on the 911 call. The prosecution wants you to think it was Christine dying. The defense says it was the family dog, Lily. Today, an audio forensics expert told the jury he can say with a "high degree of forensic certainty" that the sound matches the dog.

Antonio Barrero analyzed the 911 recording and compared it to recordings of the Banfield family dog. He broke down the science for the jury: fundamental frequencies, formants, spectrograms. Both sounds had matching characteristics in the low 200 hertz range. The prosecution pushed back on cross, getting him to admit the sound "could also have been a human." After this witness, the defense rested its entire case.

Brendan Banfield faces murder charges in the deaths of his wife Christine and Joseph Ryan. The prosecution claims he orchestrated a catfishing scheme to lure Ryan to the home so he could be killed and framed. The defense argues police corruption and manipulated evidence. Closing arguments are next.

⏰ KEY MOMENTS

00:00 - Expert testimony resumes via video
04:37 - Defense attorney begins direct examination
09:52 - Expert isolates 1.4-second sound from 911 call
17:00 - Concatenated audio played for jury
21:20 - Expert delivers conclusion: consistent with dog
22:21 - Prosecution cross-examination begins
25:59 - Defense rests its case

CASE BACKGROUND REPORT:
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📖 CASE BACKGROUND

On February 24, 2023, Christine Banfield was stabbed to death in her Herndon, Virginia home. Joseph Ryan was found shot dead beside her. Brendan Banfield and au pair Juliana Peres Magalhães initially claimed self-defense, saying they discovered Ryan attacking Christine and fired to stop him.

That story held for 570 days.

Police found no forced entry. They found communications on FetLife between Ryan and an account in Christine's name, planning a sexual encounter involving a knife for the morning she was killed. They found a framed photo of Brendan and the au pair on his nightstand eight months later.

Magalhães was arrested in October 2023. She pleaded guilty to involuntary manslaughter in October 2024. Under her deal, she gets time served if she testifies against Banfield, then deportation to Brazil. She's the State's star witness.

Banfield was indicted in September 2024 after an investigation marked by internal conflict. The digital forensics examiner concluded Christine controlled her own accounts and was transferred out of the unit. The lead detective testified he was pressured to support the catfishing theory and was moved after the arrest.

Christine Banfield was 37, a forensic nurse who spent her career helping sexual assault survivors. She left behind a four-year-old daughter who was in the house when her mother was killed.

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