Witness Hirotake Naksone Files: Trayvon Martin / George Zimmerman Case

FBI Senior Scientist in speaker recognition systems who analyzed 9-1-1 call screaming

Hirotake NaksoneThis is the information page for Hirotake Naksone, the 23rd witness called for the prosecution in the trial of George Zimmerman for the second-degree murder of Trayvon Martin.

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Hirotake Naksone

Witness Summary:

Prosecution’s 23rd witness is Hirotake Naksone, a senior scientist with the FBI in speaker recognition systems.

Hirotake Naksone says that the screams are not fit for voice comparison via electronic devices due to the signal to noise comparison. This was because of the distance between the phone and the person screaming. There was also a slight reverberation in the scream that made comparison problematic.

Naksone says that it is better for familiar voice identification it is better for this sample for the person attempting to identify the voice to have observed the person’s voice in a number of different settings.

9-1-1 Call:



Testimony in the trial of George Zimmerman from 6/28/2013:


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Additional Information:

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