The Interview Room Has Left the Precinct: Science-Based Interviewing for Internal Investigations

The Workplace Interview Is Not an Interrogation

Companies conduct internal investigations by gathering records, reviewing available evidence, identifying people with relevant knowledge, and interviewing those people in a way to understand what happened. That sounds simple. However, the quality of the interview often determines the quality of the investigation. A poorly handled interview can create confusion, resistance, risk, unreliable statements, and long-term damage inside the organization. Better information helps companies review processes and policies and make personnel decisions with more credibility.

Workplace investigations are about learning what happened, not a place for "gotcha!"

Internal investigation interviews are important and sometimes very sensitive because they often involve people who still work together after the investigation ends. Unlike many criminal investigations, the private sector may have to manage the aftermath and internal stakeholders on Monday morning. The complainant, witness, accused employee, HR representative, supervisor, and corporate security team may continue sharing the same building, project, reporting chain, or Slack channel. Therefore, the interview process should not only protect the confidentiality of the information and the professional relationships whenever possible but also be as detailed as possible.

How Do Companies Conduct Internal Investigations and Interviews?

Understand Workplace Interrogation Processes

Most companies begin with a complaint, alert, audit finding, hotline report, security concern, HR issue, compliance matter, or operational irregularity. From there, they usually collect documents, emails, access logs, video, badge records, expense reports, chat messages, inventory reports, or other records before conducting interviews. Then, investigators identify who may have direct knowledge, who may have partial knowledge, and who may be the subject of the allegation.

However, the interview itself should not become an interrogation, which usually means a shortcut to a confession. A sound workplace interview should focus on information, test explanations against known facts, and preserve the reliability of the statement. After all, the purpose of an investigation is not to find out who is at fault but to clear someone who may not be at fault at the same time. Fact-finding cannot be a one-way street if it is really about the truth. This is where Science-based interviewing offers a better path than legacy accusatory confession-driven approaches. The goal is not to win a confrontation or get a confession. The goal is to gather accurate, detailed, and checkable information and lots of it.

Workplace Investigations Are Often Challenged Through the Interviews

A workplace investigation is not judged only by the final report. If the investigation is challenged, the review often moves backward through the interviews, the notes, and the questions that created the record.

Who was interviewed?

Who was not interviewed?

Was the complainant given a real opportunity to explain?

Was the respondent given a fair opportunity to respond?

Were key witnesses overlooked?

Were follow-up questions asked?

Were records, policies, emails, access logs, messages, or other documents used to test what people said?

Did the investigator ask open-ended questions, or did they lead people toward a theory?

Did the investigator document what was said, what was disputed, and what could be corroborated?

These questions matter because the interview process often becomes the visible proof of whether the investigation was fair, neutral, and complete. A company may believe it reached the right decision, but the decision becomes harder to defend if the interviews were rushed, incomplete, biased, poorly documented, or built around assumptions.

This is why interviewing is not a soft skill in workplace investigations. It is a risk-management skill. It is an evidence-gathering skill. It is a credibility-assessment skill. It is the part of the investigation where fairness and the truth becomes visible.

Neutrality is not proven by saying the investigator was neutral. It is shown in the interview process. Did both sides get neutral open-ended questions? Did the investigator test information that supported the allegation and information that weakened it? Did the investigator allow people to explain, clarify, and provide context? Did the investigator avoid treating job title, confidence, emotion, or reputation as a substitute for evidence? In workplace investigations, neutrality must be demonstrated through the questions, better questions.

The Old Interrogation Playbook Followed Business Into the Workplace

Historically, the terms interview and interrogation, often used interchangeably, have carried different meanings. In law enforcement, an interview often refers to questioning someone who is not in custody, is not formally restrained, and is free to leave. A custodial interrogation, on the other hand, involves questioning a person who is in custody or otherwise deprived of freedom. That distinction matters because custody and interrogation trigger constitutional rights, voluntariness, and the admissibility of statements.

In the United States, the word "interrogation" also carries legal weight. Miranda v. Arizona helped shape how police, courts, trainers, and investigators think about custody, questioning, warnings, waivers, and statements. Although private-sector interviews are not always governed by the same constitutional rules as police interrogations, the language and methods from law enforcement have influenced corporate investigations, HR interviews, and corporate security practices for decades.

However, many legacy accusatorial models made a second, more tactical distinction. In those models, the “interview” is not just a neutral information-gathering conversation. It is often used as a screening tool to judge credibility, read behavior, and decide whether the person is supposedly truthful or deceptive. Once the investigator decides the person is guilty, the process shifts into “interrogation,” where the goal becomes obtaining an admission or confession.

That shift is dangerous. It can move the interviewer away from curiosity and information-gathering and toward confirmation. Instead of asking, “What happened, and how do we know?” the investigator may begin asking questions designed to support a conclusion already reached. In workplace investigations, corporate security interviews, and law enforcement settings, that can contaminate statements, increase resistance, damage rapport, and turn an information-gathering process into a guilt-presumptive one.

Over time, those lines became even more problematic when accusatorial thinking moved beyond suspect interrogations and into victim and witness interviews. In some law enforcement settings, the same flawed credibility assessments and guilt-presumptive tactics were used on victims of sensitive crimes. Instead of gathering a full account, protecting memory, and looking for corroboration, the interview could become an effort to test, challenge, or pressure the person after life-altering traumatic events. In the worst cases, that approach contributed to false recantations, especially when the interviewer treated uncertainty, trauma responses, fragmented recall, or emotional presentation as signs of deception or lack of credibility.

That mindset did not stay inside law enforcement. It also bled into the workplace as interview and interrogation training curricula were adapted for workplace investigations, corporate security, HR, compliance, and other fact-finding settings. As a result, methods designed around suspicion, confrontation, and confession-seeking were sometimes repackaged for employee interviews. That harms the reliability of workplace investigations because witnesses, complainants, and accused employees may all face questioning shaped by the same faulty assumptions: read behavior, decide credibility, use pseudoscience, apply pressure, and push for a version that fits the investigator’s theory.

The Terrible Two: Accusatory Interviewing and Pseudoscientific Lie Detection

The biggest problem with legacy interviewing is not always bad intent. Many people using these methods believe they are being firm, strategic, or professional. Yet the techniques themselves often rely on poor human communication. Accusations, interruptions, pressure, theme development, moral blame-shifting, and premature evidence disclosure can all shape what a person says next.

The second problem is pseudoscientific credibility judgment. Too many interview and interrogation training programs have taught people to judge truthfulness from behavior, posture, eye movement, nervousness, fidgeting, gaze direction, or other weak and nonexistant cues. That is dangerous in law enforcement, and it is dangerous in workplace investigations; it creates misclassification errors. When investigators decide someone is lying or guilty based on shaky behavioral assumptions, they may start steering the interview toward confirmation instead of discovery.

Warning label for the Terrible Two: accusatory interrogation methods and pseudoscientific lie detection practices

Put together, these two problems are why I refer to them as the Terrible Two: accusatory interviewing and pseudoscientific credibility judgment. One pushes the interviewer toward pressure, confrontation, and confession-seeking. The other gives the interviewer a false sense of certainty about who is truthful and who is deceptive. Together, they can create a false reality inside the investigation. The interview stops being about truth-seeking and becomes about making the facts fit the interviewer’s belief. Even when these methods are advertised as ethical, research-based, or focused on the truth, the foundation often remains the same: weak behavioral assumptions, guilt-presumptive questioning, and credibility claims that do not hold up. Much of the research on behavioral lie detection shows accuracy barely above chance, often summarized around 54%, which is far closer to a coin flip than a reliable investigative method.

Statement Contamination Is a Business Risk

How do you assess credibility after you have already given the person the answer? How do you know whether the employee remembered the detail, guessed correctly, accepted your suggestion, or simply repeated the information you leaked? How do you test truthfulness after you have shown the person the evidence, framed the allegation, and asked confirmatory questions that point toward your theory?

That is the problem with poor questioning and premature evidence disclosure. Confirmatory questioning and overpowering someone with evidence are part of the accusatory school. They may feel strong in the moment, but they can weaken the investigation because they teach the interviewee what matters, what the investigator knows, and what explanation may fit the evidence.

Statement contamination happens when the interviewer gives away information, suggests answers, interrupts memory, pressures agreement, dumps evidence, or leaks case information with poor questioning. Once that happens, the investigator and the organization will never know if the employee remembered, guessed, adopted, or just repeated the detail.

That is why competent investigators protect statements like evidence. They start broad. They let the person talk through free narratives. They ask open-ended questions. Then, they use funnels to narrow carefully. They avoid leading questions. When it comes to evidence, use Strategic Use of Evidence (SUE) an interviewing method not widely known in the united states but developed for counter-interrogation strategies and from field-tested methods. With SUE you can get additional information, test credibility, and leverage your evidence for more case-relevant information. You will have the opportunity to obtain an uncontaminated, corroborated statement. This is the gold standard of statement evidence. You lose this opportunity with accusatory methods.

Incomplete Interviews Create Vulnerable Investigations

One of the easiest ways to challenge a workplace investigation is to show that the investigator failed to interview people with relevant knowledge. Sometimes the missing witness is obvious. Other times, the missing witness appears only after interviews reveal who attended the meeting, who received the message, who approved the decision, who saw the interaction, or who had prior knowledge of the conflict.

That is why workplace interviewing should not be treated as a fixed checklist. Each interview should help the investigator identify the next piece of information. A good interview may reveal additional witnesses, missing documents, prior complaints, inconsistent timelines, policy gaps, or alternative explanations that were not obvious at the beginning.

Science-based interviewing supports this process because it starts broad, lets people talk, and follows the information where it leads. The investigator is not just confirming a theory. The investigator is building a record.

Science-Based Interviewing for Internal Investigations Start With Information, Not Confession

The purpose of an interview should be information. That remains true whether the setting is law enforcement, corporate security, compliance, HR, loss prevention, government, or private-sector investigations. It remains true if it is an interview or an interrogation. If a training program says the primary goal is confession, that should raise a red flag. This is an accusatory, guilt-presumptive method, even if they claim it is not, because the interrogation now has one goal.

Research comparing broad approaches has repeatedly separated accusatorial methods from information-gathering methods. One systematic review described information-gathering approaches as rapport-based, truth-seeking, and active-listening oriented, while accusatorial methods were described as accusation, confrontation, psychological manipulation, and disallowing denials. The review found support for information-gathering approaches, including experimental findings suggesting more true confessions and fewer false confessions compared with accusatorial methods.

Confession Obsession Is Too Narrow for Internal Investigations

For far too long, interview success has been measured by whether the investigator got an admission or confession. That is too narrow. There are more metrics for any interview than just a confession. In many internal investigations, the most valuable outcome may be a timeline, a policy gap, a corroborated witness statement, an explanation for a suspicious transaction, a source of missing records, or a false exculpatory statement that can be tested against reliable evidence.

We often forget about the value of false exculpatory statements. These are not guesses about deception. They are known lies—statements that can be proven false through reliable evidence. This idea is loosely connected to the law of non-contradiction, one of the basic pillars of logic: two contradictory claims cannot both be true at the same time and in the same way. If the evidence shows one thing, and the person gives an account that directly contradicts that evidence, the investigator is no longer trying to read eyes, interpret posture, or act like a human lie detector. The investigator can point to a factual departure from the truth.

False exculpatory statements can also be powerful as confessions for juries (Brimbal & Jones, 2018). Research suggests that exposed lies may be perceived as just as persuasive as confessions when they are clearly connected to reliable supporting evidence. That is another reason to stop treating confession as the only meaningful interview outcome. A provable lie, gathered without contamination, can be strong evidence.

That is why uncontaminated statements matter so much. If the investigator has not leaked the evidence, suggested the answer, or fed the person the case theory, then the person’s statement has far more value. Through the Strategic Use of Evidence, the investigator can test the account against known facts, identify meaningful contradictions, and still give the person a fair opportunity to explain. That process gives the truthful person room to clarify, correct, and provide context. It also gives the person who is at fault an opportunity to take responsibility. However, you cannot do this well with contaminated statements because once the investigator has supplied the key facts, it becomes much harder to know where the person’s information came from.

This is also why science-based methods are stronger than accusatory methods across the metrics that actually matter: information gathered, cooperation, accuracy, corroboration, reliability, and defensibility. We have to move past the confession obsession. A confession is not the only valuable outcome, and making it the central goal can create a false narrative about what a successful interview looks like. There are better ways to interview, better ways to test truthfulness, and better ways to build reliable investigations.

In other words, a person does not have to confess for the interview to matter. A well-conducted interview can produce checkable details, reveal contradictions, identify additional evidence, expose weak assumptions, and help decision-makers understand what happened. That is especially valuable in workplace investigations where the organization may need to make employment, legal, safety, compliance, or risk-management decisions.

Science-Based Interviewing Training Gives Companies a Cleaner Method

Science-Based Interviewing training teaches investigators to use research-supported methods instead of pressure, guessing, or personality-driven tactics. This includes rapport, active listening, open-ended questions, careful funnel questioning, cognitive interview principles, strategic evidence use, planning, and bias control. As a result, the interview becomes more structured, more defensible, and more focused on reliable information.

Field validation work has also moved this conversation beyond theory. A practitioner-developed Science-Based Interviewing and Interrogation course was assessed with investigators from three local law enforcement agencies. After training, investigators increased their use of science-based tactics, and those tactics were associated with greater cooperation, more information disclosure, and more admissions or confessions. That point matters for business leaders: information-gathering does not mean “soft” or ineffective. It means disciplined.

Rapport Is Not Being Nice to a Fault

Some corporate leaders hear “rapport” and think it means being passive, agreeable, or weak. That misses the point. Rapport is a working communication alliance. It helps people talk, helps the interviewer listen, and helps the investigation gather more complete information. It does not require the investigator to surrender the facts, ignore misconduct, or avoid hard questions.

Research on rapport-based interviewing shows that rapport can support cooperation and information disclosure. A rapport-based training study with law enforcement investigators found that evidence-based tactics increased perceptions of rapport and trust, reduced resistance, and increased information yield. Likewise, operational field research found that rapport-based interpersonal skill increased useful information, while maladaptive interviewer behavior reduced yield.

The Private Sector Has Relationship Costs the Public Sector Often Does Not

Corporate security and HR investigators often interview employees, managers, contractors, executives, vendors, or team members who may remain connected to the organization. Therefore, an unnecessarily accusatory approach can create retaliation complaints, morale problems, reputational harm, legal exposure, and future cooperation problems.

Additionally, extremely coercive private-sector interviews can create serious civil liability concerns. In some workplace cases, the issue may not be labeled “false confession” the way it is in criminal law. Instead, the dispute may involve claims such as false imprisonment, coercion, emotional distress, retaliation, or wrongful termination. Therefore, companies should avoid interview methods that depend on pressure, isolation, intimidation, or psychological cornering.

Evidence Should Be Used Strategically, Not Thrown on the Table

Many investigators reveal evidence too early because it feels powerful. They show the email, badge swipe, video clip, register report, GPS record, or screenshot and then ask the person to explain it. However, once the interviewer reveals the evidence, the person can shape their statement around it. That may feel efficient, but it often reduces the value of the interview.

The Strategic Use of Evidence technique gives investigators a better structure. SUE is not merely late evidence disclosure. It is a questioning technique, a planning technique, and an evidence strategy. A SUE reference guide explains that the method uses questioning to allow truthful people to be forthcoming while helping deceptive people create omissions, denials, and statement-evidence inconsistencies. It also describes evidence disclosure as a tactic that can make one piece of evidence more effective than if it were revealed in its most precise form at the beginning.

A Better Workplace Interview Process

A stronger internal interview process starts before the interview. First, define the allegation or concern. Next, identify what is known, what is assumed, what still needs to be tested, and what evidence should be held back. Then, prepare broad prompts, topic areas, and evidence-related questions that do not reveal the evidence too early.

During the interview, begin with expectations and transparency. Explain the purpose in a neutral way. Then ask for a free narrative: “Tell me everything you remember about…” After that, use open-ended follow-ups: “Tell me more about that,” “Walk me through what happened next,” or “Help me understand who else was involved.” Finally, narrow toward specific topics and compare the account against independent evidence.

What Companies Should Look for in Interview and Interrogation Training

When evaluating interview and interrogation training, companies should ask hard questions. Is the curriculum guided by peer-reviewed research? Does it teach information gathering as the primary goal? Does it warn against contamination? Does it train investigators to use open-ended questions, active listening, and strategic evidence use? Does it address bias, planning, and documentation?

On the other hand, companies should be cautious when training promises easy lie detection, behavioral certainty, “truthful confessions,” or a renamed version of the same legacy accusatorial material. Many vendors can say their training is ethical, non-coercive, modern, or evidence-based. However, the actual curriculum matters more than the marketing language. If the method still depends on presuming guilt, reading body language, overcoming denials, and driving toward confession, it is the same old playbook.

The Interview Record Has to Defend the Finding

A workplace investigation report should not simply announce who was believed. It should show why.

That requires strong interview documentation. Investigators should capture the substance of what each person said, the key details provided, the areas of uncertainty, the contradictions, the corroborating evidence, and the follow-up questions that were asked. If a credibility decision is made, it should be tied to evidence, consistency, plausibility, opportunity, motive, corroboration, or contradiction, not body language myths or vague impressions.

A defensible finding sounds like this: “The employee denied being in the restricted area after 6:00 p.m., but badge records, video, and two witness accounts placed him there between 6:18 and 6:42 p.m. When asked to explain the discrepancy, he could not provide an alternative explanation.”

A weak finding sounds like this: “He seemed deceptive.”

One can be defended. The other can be attacked.

The Future of Workplace Investigations Is Information-Based

Companies need internal investigations that are fair, thorough, and defensible. They also need interviews that gather reliable information without damaging people, contaminating statements, or turning the process into a contest of wills. As a result, Science-Based Interviewing for internal investigations belongs in all workplace investigations, whether they are corporate security, HR, compliance, legal, audit, or ethics investigations.

Ultimately, the best workplace investigators do not try to become human lie detectors. They become better listeners, better planners, better questioners, and better evaluators of evidence. Science-Based Interviewing training helps organizations move away from accusation and toward accuracy. That shift protects the investigation, the employee, the company, and the truth.

Workplace Investigations References

Brimbal, L., & Jones, A. M. (2018). Perceptions of suspect statements: a comparison of exposed lies and confessions. Psychology, Crime & Law: PC & L, 24(2), 156–176. https://doi.org/10.1080/1068316x.2017.1390111