16 Best Investigation Interview Techniques | Unveiling Facts

Having the right tools in your repertoire can make all the difference in the intricate world of accident and incident investigation. One such vital tool is the art of conducting effective interviews. As investigators, we aim to get to the heart of what happened, understand the root causes, and find ways to prevent future occurrences. While evidence from the scene and documented reports can provide us a wealth of information, the firsthand accounts of people involved in the incident often offer the most valuable insights.

This blog aims to arm you with effective strategies and methodologies to extract precise, comprehensive, and unbiased information about an incident or accident during your interviews. The techniques we will explore range from building rapport with interviewees to asking open-ended questions, all designed to ensure that you gather as much accurate information as possible from those who experienced the event firsthand.

Whether you’re a seasoned investigator looking to improve your skills or a novice eager to learn, this guide provides practical tips to successfully navigate the complexities of accident investigation interviews. Let’s dive in and uncover the secrets to mastering investigation interview techniques!

Investigation Interview Techniques

Interview Techniques

Interview techniques refer to the strategies, methods, or procedural steps employed to effectively gather relevant information from the interviewee. These techniques can vary depending on the type of interview (e.g., job interview, investigative interview, journalistic interview). Still, they generally revolve around structuring the interview, asking appropriate questions, actively listening, and properly documenting responses.

Accident investigation interviews are a critical aspect of incident analysis and are typically conducted after an unexpected event or accident has occurred in a workplace or public setting. The primary objective of these interviews is to gather detailed and accurate information about the incident from those involved or those who witnessed it.

Benefits of Good Interview Techniques

Effective interview techniques are essential to the success of an accident investigation and offer numerous benefits:

  • Comprehensive Information Collection: Good techniques help gather detailed and extensive data about the accident, allowing for a deeper understanding of the incident.
  • Accuracy: They help obtain accurate firsthand accounts of the incident, leading to reliable conclusions.
  • Minimized Bias: By avoiding leading questions and assumptions, effective interview techniques minimize investigator-induced bias, ensuring that the data collected is as factual and objective as possible.
  • Trust Building: By demonstrating empathy, patience, and active listening, investigators can build trust with the interviewees, making them more comfortable and willing to share vital information.
  • Actionable Insights: Effective interviews can unearth root causes and underlying issues, leading to valuable insights for preventing future accidents.
  • Employee Participation: When conducted properly, such interviews can engage employees in safety procedures, fostering a safety culture within the organization.
Interview Techniques

Investigation Interview Techniques

Investigation Interview Techniques are an important part of effective investigation, whether related to a workplace accident, a crime, or any other incident requiring further understanding. These techniques aim to gather the most accurate, detailed, and unbiased information from individuals involved or witnesses to the incident. Below are some key techniques:

1. Establishing Purpose

This technique involves clearly communicating the intent of the interview to the interviewee right at the outset. The goal of an investigation interview is not to assign blame or to chastise individuals but to gather all the facts surrounding an incident. The key is to communicate that the objective is to better understand what transpired, why it happened, and how similar incidents can be prevented.

By establishing this purpose, you reassure the interviewee that they are not on trial and set a cooperative tone for the dialogue, encouraging them to be more open, honest, and detailed in their responses.

2. One-on-one Interviews

This technique is about ensuring that each person is interviewed individually. Group dynamics can subtly influence individual accounts, with some people possibly altering or withholding information due to the presence of others. By interviewing each person individually, you create a safe and confidential space for them to share their perspectives and experiences. Each person’s narrative must be heard separately to create an independent and accurate picture of the incident.

3. Background Information

Gathering background information from the interviewee is an essential first step before delving into the specifics of the incident. The purpose is to understand the broader context of the incident and possibly identify any contributing factors. It involves asking the interviewee about any circumstances, events, or factors that they believe might have led to the incident.

Once you’ve collected this background information, let the person share their account of the incident without interruptions. Listening attentively and nonjudgmentally is key here, as the person needs to feel heard and respected.

4. Avoiding Negative Assumptions

This technique revolves around the careful framing of your questions. Avoid asking questions that imply doubt or disbelief in the interviewee’s ability to recount what happened. For instance, asking, “Can you explain what happened?” suggests an assumption that the person might not be capable of explaining.

This can make them defensive and potentially hinder your investigation. Instead, use open-ended questions like “Can you tell me what happened?”, encouraging the person to freely share their narrative without feeling judged.

Investigative Interview Techniques

5. Interview Location

The interview location can significantly impact the interviewee’s ability to recall details and their comfort level during the interview. If possible, conduct the interview at the incident scene. This can trigger sensory cues that help the interviewee remember details more accurately.

However, if the incident scene is not accessible or if it might cause distress to the interviewee, choose a neutral location where they feel comfortable. An office or a meeting room is typically a good choice. The primary goal is to choose a location where the interviewee feels at ease and can focus on providing an accurate account of the incident.

6. Creating Comfort

Establishing a sense of comfort and ease during the interview process is a critical step toward ensuring effective communication. Begin by explaining the purpose of the interview and defining your role clearly. This will help the interviewee understand the context and expectations of the conversation.

Express sincere concern about the incident and share your intention to investigate it thoroughly to prevent similar incidents in the future. This will reassure the interviewee that the process is constructive and not punitive, making them more comfortable and willing to share information.

7. Friendly and Patient Approach

Throughout the interview, adopt a friendly, understanding, and open-minded demeanor. Patience is key during such discussions. Give the interviewee time to recall details and articulate their thoughts. Avoid rushing the interviewee as it might make them feel pressured and hinder the open sharing of information. Creating a calm and unhurried atmosphere can encourage more detailed and honest responses.

8. Avoid Leading Questions and Interruptions

One of the main roles of the interviewer is to facilitate an unbiased narrative of the incident. To do this, avoid asking leading questions that may imply a specific answer or skew the interviewee’s response. Instead, pose neutral questions that allow the interviewee to provide their account freely.

Additionally, avoid interrupting the interviewee while speaking or reacting visibly (positively or negatively) to their statements. Let the interviewee express their thoughts fully and freely without feeling judged.

Investigation Techniques

9. Open-Ended Questions

Encourage in-depth responses by asking open-ended questions requiring more than a yes or no answer. For example, instead of asking, “Did you see the accident happen?”, you might ask, “Can you describe what you saw at the time of the accident?”. This type of question encourages the interviewee to provide a more detailed and informative response, giving you a better understanding of the incident.

10. Avoid Defensive Questions

It’s essential to ask questions in a manner that doesn’t make the interviewee feel defensive or blamed. Questions starting with “why did you…” can often come across as accusatory and may put the interviewee on the defensive. Instead, ask questions focusing on the event and surrounding circumstances, such as “what happened?” “Where did it happen?” or “how did it happen?”.

This approach ensures that the focus stays on the incident rather than the individual, reducing the likelihood of defensive reactions and encouraging more open and honest communication.

11. Recap and Confirm

Summarizing what has been shared during the interview and confirming the details with the interviewee helps ensure the accuracy of the information. This step allows the interviewee to confirm or correct her understanding of the facts and sequence of events. In doing so, it reduces the risk of misinterpretation or miscommunication that could impact the outcome of the investigation.

12. Note-Taking and Review

As the interviewer, taking comprehensive notes during the conversation is important to capture as many details as possible. After the interview, allow the interviewee to review your notes. This additional step helps rectify errors or inaccuracies and ensures that the recorded account reflects the interviewee’s narrative.

Investigation Interview

13. Permission for Recording

Recording an interview can provide an accurate account of the conversation and be useful for further reference. However, it’s crucial to respect the interviewee’s privacy and seek their explicit consent before starting any recording. Recording without consent can lead to legal issues and harm the trust between you and the interviewee, possibly affecting their willingness to share information freely.

14. Witness Presence

Some individuals might feel more at ease if a supportive individual, such as a friend, family member, or colleague, is present during the interview. If the interviewee prefers to have someone with them, respect this request. This can provide the interviewee with emotional support and facilitate a more open and comfortable discussion.

15. Preventative Measures

As part of your investigation, ask the interviewee for their perspective on preventing similar incidents. This not only garners potentially invaluable insights for preventative measures but also makes the interviewee feel that their input is valued and can contribute to a safer environment.

16. Appreciation and Follow-up

Finally, thank the interviewee for their time and cooperation. Their contribution is valuable to the investigation, and showing appreciation fosters a positive relationship. Additionally, ask the interviewee to contact you if they remember any other details about the incident later. This keeps the lines of communication open for potentially important additional information.


The 16 Best Investigation Interview Techniques discussed are crucial to any effective accident investigation process. Mastering these techniques helps extract accurate and unbiased information, which is fundamental to understanding an incident’s causes and preventing similar occurrences.

Successful interviewing involves asking the right questions, creating a comfortable and non-threatening environment, maintaining neutrality, and respecting the interviewee’s perspective. Ultimately, the goal is to cultivate a culture of safety and learning, rather than blame, within your organization.