When we’re faced with conflicting stories, most of us have a powerful urge to “get to the bottom of things.” We want to find the definitive account, the single version of events that makes sense of the chaos. But in the world of professional fact-finding, the path to the truth is rarely straightforward. It’s a disciplined process that often requires us to abandon our most trusted instincts.
As a workplace investigator, my job is to untangle complex and contested situations. This work has taught me that many of our common-sense assumptions about memory, credibility, and human behavior are not just unhelpful, they are actively misleading. This article pulls back the curtain on professional investigations to reveal four realities, grounded in established principles, that directly challenge our most common assumptions about how to find the truth.
1. Our Built-In Lie Detectors Are Almost Useless
We’ve all seen it in movies: the shifty eyes, the nervous fidgeting, the slight tremble in the voice that signals a lie. We believe we have an innate ability to spot deception. The uncomfortable truth is that systematic research shows we don’t.
Studies have consistently demonstrated that humans are remarkably poor at detecting lies based on behavior alone. One comprehensive study found that even trained U.S. Secret Service agents were only accurate 64.12% of the time, barely better than a coin flip. Other groups fared even worse, with judges at 56.73% and college students at 52.82%.
This is why professional investigators are trained not to rely on demeanor. In fact, the Association of Workplace Investigators (AWI) explicitly “does not endorse the use of this credibility factor.” The reason is simple and profound:
Body language indicates emotions, not deception.
The stress of being interviewed, cultural differences in communication, or simple nervousness can all produce the exact same “cues” we mistakenly associate with dishonesty. An innocent person accused of wrongdoing is likely to be just as anxious as a guilty person trying to hide the truth. The discipline of intentionally setting aside these powerful, yet unreliable, instincts is what separates professional fact-finding from amateur guesswork.
2. Memory Is More Like a Wikipedia Page Than a Video Recording
We tend to think of memory as a video camera, faithfully recording events for later playback. In reality, memory is a reconstructive process. Leading memory expert Dr. Elizabeth Loftus describes our memory as being “more like a Wikipedia page: you can go in and change it, but so can others.”
This is because of a phenomenon known as the “misinformation effect.” Post-event information, such as conversations with coworkers, leading questions from an interviewer, or even media reports, can become blended into our original memory. We unconsciously integrate these new details, altering our recollection of what actually happened without ever realizing it.
The impact of trauma on memory is even more profound. When the brain is under extreme threat, it shifts into survival mode. In a neurological triage, its primary goal is to encode information that will help it survive. This means “central details,” like the immediate source of the threat, are encoded with intense, almost photographic clarity. These are often referred to as “flashbulb memories.”
At the same time, the brain actively dismisses “peripheral details”, the color of the carpet, the precise sequence of events, what was said just before or after the critical moment, as non-essential for survival. These details are poorly encoded, if at all. This is why a person can have a vivid, unshakeable memory of one moment but a complete blur of the moments surrounding it. From an investigator’s perspective, this means that gaps or inconsistencies in a person’s story are not automatic signs of untruthfulness. More often, they are predictable features of how the human brain processes and recalls stressful events.
3. A “He Said, She Said” Case Is Rarely a 50/50 Stalemate
Many people assume that a case with no eyewitnesses and two directly conflicting stories is an impossible stalemate. For a trained investigator, however, this is a common challenge, not a dead end. The goal in a workplace investigation is not to prove a case “beyond a reasonable doubt,” but to reach a finding based on the “preponderance of the evidence”, in other words, to determine which account is “more likely than not” to be true.
To do this, investigators move beyond the two primary accounts and analyze a range of other credibility factors. By methodically assembling these smaller pieces, a clearer picture often emerges. Key factors include:
- Inherent Plausibility: Does one version of events make more logical sense within the known context of the workplace and the people involved?
- Motive to Falsify: Does either person have a clear reason to lie? This could be a motive to avoid discipline, secure a promotion, or harm a rival.
- Corroboration: While there may be no eyewitness to the core event, is there any indirect evidence that supports one account? Corroboration is the “gold standard.” It can come from emails, text messages, or calendars. It can also come from “contemporaneous reporting”, for example, a witness who testifies that they saw the complainant visibly upset immediately after the alleged incident and that the complainant told them what had just happened. This type of evidence can be crucial in building a timeline and understanding the immediate impact of an event.
- Consistency: Has a person told the same essential story over time to different people, without significant contradictions?
Resolving a “he said, she said” scenario is not about a magical insight into a person’s soul. It is about the diligent work of piecing together a puzzle. As the British Columbia Court of Appeal eloquently stated:
“the real test of the truth of the story of the witness in such a case must be its harmony with the preponderance of the probabilities which a practical and informed person would readily recognize as reasonable in that place and in those conditions”.
4. Some of the Most “Damning” Behaviors Are Actually Normal Trauma Responses
Certain reactions to traumatic events, like sexual assault, can seem deeply counterintuitive to an outside observer. A person might not fight back, might not report the incident immediately, or might have a flat, emotionless demeanor when recounting what happened. These behaviors often cause others to doubt their story.
Neuroscience, however, provides a clear explanation. When the brain’s defense circuitry detects an overwhelming threat, it can trigger involuntary survival responses that override rational thought and conscious control. Understanding these is essential for any fact-finder:
- Freezing or Tonic Immobility: This is an involuntary paralysis where a person cannot move or speak, even though they are fully aware of what is happening. The brainstem inhibits movement automatically. This is not passive acceptance; it is a terrifying state of conscious awareness trapped inside a paralyzed body, a profound psychological disconnect that is frequently misinterpreted as a lack of resistance or even consent.
- Dissociation: To protect itself from an overwhelming experience, the brain can create a sense of detachment, as if the person is watching the events from outside their own body. This can lead to significant gaps in memory or a calm, emotionless affect when recounting the event, which can be mistaken for a lack of concern.
- Appeasement: In some situations, a victim may attempt to flatter or appease an aggressor as a survival strategy. Afterward, they may hide these actions not only out of shame, but out of a legitimate fear that they will not be believed or that they will be blamed for their assault. This can cause them to provide incomplete or inconsistent statements about their own actions during the incident.
Trauma-informed investigation practices recognize these behaviors not as indicators of deception, but as normal, predictable neurological responses. This knowledge helps investigators “avoid wrongly misinterpreting them as signs of deception.” It requires us to suspend judgment and understand that in the face of extreme trauma, human behavior is dictated by neurology, not by the scripts we’ve learned from television dramas.
Conclusion
Finding the truth is not a matter of gut instinct; it is a deliberate, systematic process that often requires us to work against our own common-sense assumptions. It demands that we question our ability to read people, accept the fallibility of memory, look for evidence beyond the obvious, and understand the powerful ways trauma reshapes human behavior.
The principles of a fair investigation, setting aside bias, weighing all evidence, and understanding the complexities of the human mind, don’t just apply in the workplace. The next time you’re faced with a conflicting story, how might you listen differently?
