Eyewitness testimony
Composing the lineup

When emotions are significantly important in terms of eye-witness accounts for facial-recognition processes. The change of emotion brought onto a person identifying a person from a more neutral event many not have as much of a recollection of the events than an eye-witness who not only experienced a traumatic event but identifies the person who inflicted trauma onto the person themselves. Therefore there can be more memorized events from the impact of the eye-witness seeing the perpetrator, or depending on the psychological impact, there could be details withheld, but still leading closer to who and what the perpetrator did based on the reaction of the eye-witness.
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