Interviewing Cooperating Witnesses in Organised Crime Cases in Poland: Lessons to Learn from the Méndez Principles on Effective Interviewing for Investigations and Information Gathering

Abstract

Interviewing cooperating witnesses in organised crime cases presents unique challenges and opportunities for law enforcement. The paper examines, within this context, the application of the Principles on Effective Interviewing for Investigations and Information Gathering, adopted under the auspices of the United Nations, to enhance the efficacy and integrity of information gathering during criminal investigations. The Méndez Principles, which emphasise non-coercive, ethical, and scientifically grounded interviewing techniques, provide a framework for improving the accuracy and reliability of cooperating witnesses’ testimonies, mitigating biases and reducing associated risks. The author outlines the significance of integrating the Méndez Principles into the national criminal justice system to, from this perspective, foster trustworthy investigative outcomes. This approach addresses the complexities of organised crime cases, ensuring that cooperating witnesses provide valuable and reliable information to support the pursuit of justice.