Evidence Gathering in Independent Investigations
You hired an independent investigator to find the truth. But knowing what “the truth” requires — and what a thorough search for it actually looks like — is your responsibility. Here’s how to hold your investigators accountable for the work that protects your youth.
When an allegation surfaces in a youth-serving organization, most administrators do the right thing: they bring in an independent investigator. They step back. They let the process run. And then, weeks or months later, they receive a final report and often accept its conclusions with little more than a surface-level review.
That deference is understandable. After all, you want the investigator to be independent. The investigation process is complex, the language is specialized, and the instinct to trust an outside professional is a reasonable one. But good oversight doesn’t necessarily impair the independence of an investigation. Done correctly, it can enhance the entire investigation. And without oversight, even a well-intentioned investigator can deliver work that is incomplete, poorly reasoned, or quietly shaped by assumptions that no one ever examined.
Your role as an administrator is not to conduct the investigation and certainly not to control it. Your role is to ensure the investigation is conducted well — from the moment you engage the investigator and set the scope of the investigation to the moment you act on their findings. That means knowing what to ask before the work begins, what to look for while it’s underway, and what questions to press when the report arrives. The following principles and best practices give you the framework to do exactly that.
The First Conversation: Establishing the Standard of Proof
Before the evidence collection begins, you need to have a direct conversation with your investigator about the standard of proof that he or she will apply. This is not optional. It is the single most important expectation you can set, because it determines how much evidence the investigators need to gather before they can reach a conclusion — and it determines how you evaluate whether they’ve done enough.
There are three standards, and they are not interchangeable.
Beyond a reasonable doubt is the standard used in criminal investigations. It requires near-certainty. It is not your standard. If your investigators are applying this bar — consciously or unconsciously — they will almost certainly conclude that allegations are unsubstantiated, not because the evidence doesn’t support them, but because no organizational investigation can produce the level of certainty a criminal prosecution demands. If you hear language suggesting this standard is being applied — phrases like “we can’t be completely sure” or “there’s no way to know for certain” — ask directly what standard they are working under.
Clear and convincing evidence is a middle standard that requires the evidence to make the allegation “highly probable.” Some state licensing bodies or accreditation standards require this level for investigations. If your organization operates under such a requirement, your investigators need to know it from the start, and you need to confirm they understand what it demands.
Preponderance of the evidence — “more likely than not” — is the standard most independent investigations apply. It does not require certainty. It requires that the weight of all available evidence, taken together, tips the scale toward one conclusion. This is a meaningful, defensible standard. But it only works if the investigator actually gathers all available and relevant information. An investigator who stops at two interviews and calls the matter unresolved has not applied this standard — he or she has avoided it.
Your expectation should be clear and stated explicitly at the outset: What standard are you applying, and how will you demonstrate in your report that you have met it? If the investigator cannot answer that question directly, that fact is itself a signal worth paying attention to.
What You Should Expect When It Comes to Credibility Assessment
Credibility is where investigations get uncomfortable — and where they most often go wrong. When investigators receive conflicting witness accounts, the investigator must make a judgment about whose version of events the evidence more strongly supports. That judgment is consequential, and you have every right to expect that your investigator made it using a structured framework rather than instinct.
Here is what a rigorous credibility assessment looks like, and what you should be able to see reflected in the investigator’s report.
The investigator should have examined internal consistency — whether each person’s account remained stable across the interview, or whether it shifted in significant ways when questions were asked from different angles. Minor variations are normal, particularly with victims of trauma. Memory is not a recording, and trauma can disrupt normal memory formation. But the investigator should be able to point to specific moments where consistency held or broke down, and explain why those moments mattered.
The investigator should have tested external consistency — whether the account aligns with independently verifiable facts. Schedules, sign-in records, physical layouts, and the testimony of other witnesses are the sort of facts you should be hearing about. An account that cannot be corroborated by evidence outside the interview is not automatically false, but the investigators should have looked for corroboration and should be able to explain what they found or didn’t find.
They should have noted specificity of detail. Accounts that are rich with sensory and contextual detail — even unexpected or seemingly insignificant detailed information — carry different weight than accounts that are general and rehearsed. The investigator should be able to articulate why certain accounts felt grounded and others did not, and what evidence informed that assessment beyond personal impression.
They should have considered motivation and context for every person interviewed — not to assume bad faith, but to understand the full landscape. A youth facing disciplinary action, a staff member in the process of being terminated, a colleague with a known grievance — these contexts don’t invalidate testimony, but they are part of the picture, and the investigator should have accounted for them.
And critically, the investigator should have assessed behavioral consistency over time — particularly in cases involving trauma. Trauma responses vary enormously. Delayed disclosure, emotional numbness, fragmented memory, and avoidance are all well-documented responses to traumatic experience. An investigator who treated a survivor’s composure or delayed reporting as evidence of dishonesty applied a standard that research does not support. You should ask: What did you consider when evaluating how this person’s behavior aligned with their account? How did you account for the ways that trauma affects disclosure?
If the report does not address these dimensions or addresses them only in passing, the credibility determination it contains is suspect. Push back and request more information.
Expecting Your Investigator to Look Beyond Interviews
One of the most common failures in organizational investigations is scope. An investigator conducts interviews, writes them up, and treats the report as complete. It is not. Interviews are one source of evidence among many — and in some cases, they are not even the most reliable source. You should expect your investigators to gather evidence across multiple categories, and that their report accounts for what they found — and what they looked for and didn’t find.
Digital communications should be part of every investigation where they are relevant. Text messages, emails, internal messaging platforms, shared documents — these create a contemporaneous record that is extraordinarily difficult to fabricate. If the allegation involves any communication between individuals, or if it involves a timeframe during which relevant communications might exist, you should ask: What digital records did you request? From whom? Were any records unavailable, and if so, why? An investigator who did not seek digital evidence when it was clearly relevant has left a significant gap in the investigation.
Policy and procedure documentation is evidence in its own right. If your organization has policies or codes of conduct governing staff-youth contact, supervision requirements, reporting obligations, or incident response, the investigators should review them. They also should assess whether your staff and volunteers followed those policies, and whether your organization communicated and enforced them. A policy that exists on paper but staff never learned about or routinely ignored without consequence is not just a procedural gap. It is evidence of a systemic failure that the investigator needs to tell you about.
Patterns and history require the investigators to look beyond the current allegation. Has this individual been the subject of previous complaints? How were those complaints handled? Do multiple, independent sources describe similar experiences? Pattern evidence is among the most powerful evidence available in an organizational investigation, and it requires the investigators to do research that goes well beyond the interviews in front of them. If the report does not address whether a pattern exists — or explicitly states that no pattern was found and explains how they determined that — ask why.
Physical and environmental evidence matters more than most administrators realize. If possible, the investigators should visit the spaces where the alleged events occurred. They should understand the layout, the sight lines, and the supervision structures — or lack thereof. An allegation that an event occurred undetected is far more or less plausible depending on what the physical environment actually looks like. If the investigator did not visit the relevant spaces, or did not address the physical context in their report, that is a gap worth closing.
The question to ask is simple: Beyond the interviews, what other evidence did you gather, and what did it show? If the answer is thin, the investigation is thin.
Holding Your Investigator Accountable on the “He Said / She Said” Problem
If your investigator returns a report concluding that an allegation is unsubstantiated because the accounts conflict and there is “no way to determine” which is accurate, you should not accept that conclusion without pressing back — hard.
The “he said, she said” framing is almost always a sign that the investigation stopped too early. It assumes that when two people disagree, the matter is unresolvable. In practice, that is rarely true. It is true only if the investigator looked at nothing beyond the two conflicting testimonies — and as the previous section makes clear, there is almost always more to look at.
Walk through the scenario with your investigator. If a youth alleges that a staff member engaged in inappropriate conduct during a session, and the staff member denies it, the investigator’s job is not to choose between the two accounts based on impression. Their job is to build a picture using every available source of evidence. Is there a record that the session actually happened? Did your policies authorize it? Were other staff present in the building? Do any records — scheduling systems, sign-in sheets, digital communications — place these two individuals together at the time in question? Has this staff member been the subject of prior concerns? Did the youth tell anyone else, and if so, when and what did they say?
Each of those questions is an opportunity to move the investigation beyond the impasse. Not every question will produce a definitive answer. But collectively, they often create a weight of evidence that points in one direction or the other — and that is exactly what the preponderance standard asks for.
If your investigator concluded that the matter was unresolvable without pursuing these lines of inquiry, the problem is not that the case was genuinely unresolvable. The problem is that the investigation was not thorough enough to resolve it. That is an accountability issue, and it is yours to raise.
What the Report Owes You: Documented Reasoning
When the investigation is complete, you will receive a report. That report is not just a conclusion. It is — or it should be — a transparent account of how that conclusion was reached. If it isn’t, you cannot defend it. Not to your board, not to a licensing body, not to the families of the youth in your care, and not to yourself if anyone later questions the conclusion.
Here is what you should expect to see in the investigator’s reasoning, and what you should ask for if it is missing:
The report should state clearly what standard of proof the investigators applied and why. If the report does not have that information, you do not know whether the investigator applied the right bar — or whether they applied any bar at all.
It should summarize all evidence gathered — not only the evidence that supports the conclusion, but the evidence that complicates it or cuts against it. A report that presents only one side of the evidentiary picture is not a thorough investigation. It is an argument. You need to see the full landscape in order to evaluate whether the conclusion is sound.
It should explain how the investigators assessed credibility. Which factors did they consider? What did the investigators observe, and what did they conclude from it? If credibility was a significant factor in the outcome — and it almost always is — the reasoning behind that assessment needs to be visible and contestable.
It should articulate how the investigators weighed conflicting evidence. When two pieces of evidence point in different directions, the investigators made a judgment about which carried more weight. The report should explain, not assume, that judgment. If they gave digital communications more weight than a verbal denial, the report should say why. If a pattern of prior complaints informed the conclusion, the report should explain what that pattern looked like and why it was significant.
And the conclusion itself should flow logically from the evidence and the reasoning that precedes it. A reader — including you — should be able to follow the thread from what was found, to how it was assessed, to what it means. If there are gaps in that thread, or if the conclusion appears without adequate support, you have every right to ask the investigator to close them before you act on the findings.
Documented reasoning is not bureaucratic overhead. It is the mechanism by which you hold the investigator accountable for the quality of their work.
The Harder Conversation: Bias, and Your Responsibility to Name It
No investigator is immune to bias. This is not an accusation — it is a human reality. Bias operates below conscious awareness, shaping perception and judgment in ways that feel entirely objective to the person experiencing them. Your role as an administrator is not to assume your investigator is biased. It is to build accountability structures that surface bias when it exists — and to be willing to name it when you see it in the report.
Confirmation bias is the tendency to seek out and prioritize evidence that supports a conclusion the investigator has already begun to form, while giving less attention to evidence that complicates it. If the report reads as though the investigator arrived at a conclusion early and then built a case around it — rather than gathering evidence first and drawing a conclusion from it — that is worth examining closely. Ask: At what point in the investigation did you begin to form a conclusion? What did you do to challenge it?
Status bias leads investigators to find the accounts of individuals in positions of authority more credible than those with less power — often without realizing it. In a youth-serving organization, this can manifest as an unconscious tendency to believe a long-tenured staff member over a young person, or a well-liked leader over a quieter colleague. The power differential between adults and youth in your organization makes this form of bias particularly consequential. If the credibility assessment in the report consistently favors adults over youth without clear evidentiary justification, that pattern deserves scrutiny.
Cultural and demographic bias can shape how an investigator perceives emotional expression, communication style, and behavioral response — particularly when the individuals involved come from backgrounds different from the investigator’s own. A youth who does not display visible distress, who discloses in a matter-of-fact tone, or who delayed reporting for months is not behaving in a way that undermines their credibility. These are well-documented responses to trauma. An investigator who treated any of these behaviors as evidence of dishonesty applied an assumption — not an assessment. You should ask: How did you account for the possibility that this person’s response was consistent with trauma rather than inconsistent with truthfulness?
Addressing bias does not mean accusing your investigator of bad faith. It means creating a process in which bias can be identified and corrected. If you have the budget, a second reviewer — someone independent of the investigation — can evaluate the report’s reasoning and flag inconsistencies the investigator may not see in their own work. Consider making that second review a standard part of your process, not an exception reserved for cases where you already suspect a problem.
Before You Sign Off: A Final Accountability Check
When the report lands on your desk, resist the urge to accept it at face value — especially if the conclusions feel comfortable or convenient. The questions above are not a formality. They are the mechanism by which you fulfill your obligation to the youth in your care. If the report is not ready for you to act on, send it back. Ask for what is missing. Hold the standard.
That is not a failure of trust in your investigator. It is the fulfillment of your responsibility as the leader of an organization that has made a commitment to protect the young people entrusted to its care.
My law partner, Tom Rawlings, and I provide trauma-informed training and investigation guidance designed specifically for youth-serving organizations. If your organization is building the oversight structures to hold investigations accountable — or navigating an active investigation right now — we’re here to support you.