Preparation for interviews includes identifying objectives, obtaining consent, and arranging a neutral setting. Craft neutral, open-ended questions and plan follow-ups to uncover facts without leading the interviewee.

During interviews, use active listening, manage emotions, and document responses accurately. Record notes or audio with consent, maintain confidentiality, and avoid contradicting statements. Seek corroborating details and determine credibility based on consistency and context.

Evidence handling requires a clear chain of custody for all materials, secure storage, and version control. Preserve original documents, emails, and digital logs. Link each piece of evidence to specific findings and protect privacy.