Limitations of traditional police interviews

Police interviews have long been a key tool in gathering eyewitness accounts during investigations. However, traditional approaches often fall short in producing reliable information. These methods typically involve a standard list of questions, which can lead to incomplete or inaccurate recall from witnesses.

Common problems with traditional interviews

• Inappropriate or poorly phrased questions - Questions might be worded in a way that distorts memory.
• Questions asked out of sequence - Jumping between topics can disrupt the witness's ability to recall events coherently.

As a result, the quality of eyewitness accounts from traditional interviews can be low, potentially leading to flawed investigations.

The cognitive interview technique

The cognitive interview is a method developed to enhance the accuracy and detail of witness recall by drawing on psychological research about memory. This technique addresses the shortcomings of traditional interviews and has been updated over time.

Psychological foundations of the cognitive interview

• Retrieval cues - These are prompts or triggers that help access stored memories; they can be linked to the emotional state (state cues) or the physical environment (context cues) present during the original event.
• Schemas - These are mental frameworks or organised patterns of knowledge based on past experiences; people often distort memories to fit their schemas, which can lead to forgetting important details or filling gaps with inaccurate information.

Key ethical issues in interviewing witnesses

When conducting interviews, especially in sensitive contexts like criminal investigations, ethical considerations are essential to protect participants. The primary goal is to ensure that the process does not cause harm or distress to the interviewee.

Core ethical principles for interviews

• Informed consent - This means obtaining clear agreement from the interviewee before starting, after explaining the purpose, process, and any potential risks involved.
• Confidentiality - All information shared must be kept private, assuring the interviewee that their details will not be disclosed without permission.
• Right to withdraw - The interviewee can choose not to answer specific questions or end the interview at any time, without facing pressure or consequences.
• Avoiding distress - If the interviewee shows signs of upset, the interview should stop immediately to prevent psychological harm.
• Transparency and non-prejudice - The process must be open, unbiased, and free from any coercion (forcing or manipulating responses), ensuring questions are asked fairly.

These principles apply particularly in criminal psychology, where interviews can involve traumatic events. Any recordings or notes from the interview must only be used as the interviewee wishes, respecting their autonomy.

The PEACE framework for ethical investigative interviewing

The PEACE framework is a structured approach developed in the UK to guide ethical interviewing in investigations. It promotes high-quality, reliable accounts from witnesses while adhering to ethical standards.

Stages of the PEACE framework

The framework breaks down the interviewing process into five sequential stages, each designed to support ethical practices and effective information gathering.

These stages are:

1. Planning and preparation - This initial stage focuses on setting clear aims and objectives based on the investigation's needs. Factors like the interviewee's age, culture, and background are considered, along with practical details such as location and relevant offence knowledge, to ensure the interview is tailored and respectful.
2. Engage and explain - Here, the interviewer builds rapport by encouraging open conversation, drawing on the interviewee's personal characteristics. The purpose of the interview is clearly explained, including reasons for any arrest, to foster trust and reduce anxiety.
3. Account, clarification, and challenge - The core of obtaining information involves prompting the interviewee to provide their account, starting with open invitations like "tell me what happened." Questions should be simple, open-ended, and non-leading to elicit natural responses, avoiding forced-choice or multiple questions that could bias recall.
4. Closure - The interview ends with a structured summary of what was discussed, ensuring it does not conclude abruptly to prevent distress. This stage confirms understanding and addresses any remaining concerns.
5. Evaluation - After the interview, the outcomes are reviewed against the original aims, determining if further action is needed and assessing the overall effectiveness.

This framework helps investigators obtain accurate witness accounts ethically, reducing the risk of coercion or harm while improving the reliability of the information gathered.