Trauma, the Body, and Credibility: What Somatic Science Tells Us About Immigration Testimony

Trauma is not only a memory. It is a physical state that lives in the nervous system and shapes how a person speaks, remembers, and holds their face while telling the hardest story of their life. When testimony is judged on demeanor alone, that biology can be misread as evasion. A forensic evaluation puts the science on the record so trauma is understood rather than penalized.

Trauma lives in the body, not just the story

We tend to imagine that a truthful account will come out clearly, in order, with feeling that matches the facts. Somatic and nervous-system science tells a different story. When a person survives persecution, violence, or coercion, the body records the event as a threat state, and that state can reactivate long after the danger has passed. The survivor is not choosing how to present. Their physiology is doing what it learned to do to stay alive.

This is the heart of polyvagal theory, which maps how the autonomic nervous system moves between states of safety, mobilization, and shutdown. Under threat, the body can push toward fight or flight, or it can drop into a protective collapse: flat, distant, and numb. Neither response is under conscious control, and neither is a sign that a person is lying.

Why trauma can look like evasion

An adjudicator is often asked to weigh credibility from a person's demeanor. But the very presentations that trauma produces are the ones that a casual read can mistake for dishonesty. When the nervous system is protecting itself, the outward signs can be misleading:

• Flat affect, where the person recounts terrible events with little visible emotion, because the body has muted its response to survive.
• Numbness or detachment, which can read as indifference but is often dissociation, a nervous-system shutdown under stress.
• Hypervigilance, startle, or an inability to settle, which can look like agitation or defensiveness.
• Difficulty telling events in order, because traumatic memory is often stored in fragments rather than a clean timeline.
• Gaps, inconsistencies in small details, or a delay in ever coming forward, all of which are common features of how trauma is remembered.

None of these is proof of fabrication. They are, in many cases, exactly what the clinical literature would predict from someone who lived through what the person describes. This is a hallmark of complex trauma, where repeated or prolonged harm reshapes memory, emotion, and the body's baseline sense of safety.

What a forensic evaluation adds to the record

A forensic psychological evaluation does not ask an adjudicator to take demeanor at face value. It supplies an objective, clinically grounded picture that explains what the body is doing and why. Working from a structured clinical interview and standardized measures, the evaluator documents the person's symptoms, situates them within recognized diagnostic criteria where the findings support it, and describes, on a clinical basis, how their nervous-system responses appear in an interview setting.

Where it is relevant, the report can explain the specific presentations above in plain terms: why a survivor may recount horror with a flat face, why memory arrives out of order, why a delay in coming forward is consistent with the injury rather than at odds with it. The same science that informs somatic practices in the clinical setting becomes, in the forensic setting, a way to help the record read a person's body accurately. The goal is not to argue the case. It is to make sure that trauma presentation is understood rather than mistaken for something it is not.

A forensic evaluation is not treatment, and it does not coach a person on how to appear. It documents what the nervous system is doing and explains it in clinical terms, so an objective reader can weigh the account fairly. No fee is ever tied to the outcome of the case.

Objective evidence, not advocacy

The value of the evaluation rests on its neutrality. The evaluator documents psychological findings and leaves the legal conclusions to the attorney. That boundary is what keeps the opinion usable as evidence. The report does not promise a result and does not tell an adjudicator how to rule. It offers a careful, independent account of how trauma lives in this person's nervous system, so that the demeanor an adjudicator observes can be read in light of the science rather than against it.

For attorneys, this closes a common gap. A client's story may be true and still land poorly on the stand, precisely because their body is doing what trauma trained it to do. A clinically grounded evaluation gives the file a way to account for that, in language an adjudicator can weigh.

When to consider one

Consider an evaluation when a client's demeanor may work against a credible account, when memory of events is fragmented or out of order, when a delay in coming forward will need a clinical explanation, or when the psychological injury is central to the case. Earlier is better, because it leaves time for a careful assessment and a report that is ready to accompany the petition.

Dr. Reyna Aday, PhD, LMHC, CFMHE, is a Certified Forensic Mental Health Evaluator whose clinical specialty is trauma and the nervous system, and who prepares immigration evaluations in English and Spanish. She is licensed in Florida, New Jersey, Pennsylvania, Texas, and New Mexico. Attorneys can learn how referrals work to discuss whether an evaluation would strengthen a case.