Interviewing suspects

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  • Interviewing Suspects
    • Mann - Police officers ability to detect suspects lies
      • Field experiment
      • 99 Kent police officers
      • P's asked to judge truthfulness of people in real life interviews
        • P's shown 14 clips
          • P's filled out questionnaire  about their experience
          • After each clip indicated if they thought it was the truth or a lie
            • They then had to put how confident they were about their final decision and also the cues they used to detect lies
      • Results
        • No difference between identification of lies or truth
        • Experience in interviewing positively correlated with accuracy
        • Most frequently used cue was gaze
      • Conclusions
        • Officers often paid attention to cues that are not necessarily indicators of lying e.g gaze
    • Inbau et al: 9 steps of interrogation
      • 1. Direct confrontation
      • 2. Suspects offered the chance to take the blame away by being offered some justification
      • 3. Suspect never allowed to deny guilt
      • 4. Ignore reasons for innocence
      • 5. Keep eye contact and use first names
      • 6. Suspect will become quiet - if they cry infer guilt
      • 7. Give suspect two options - both infer guilt
      • 8. Get suspect to admit guilt in front of witness
      • 9. Document confession and get suspect to sign it
    • Gudjohnsson: A case of a false confession
      • Case study
        • 17 year old accused of to murders
      • Interview
        • FC's first interview was 14 hours
          • FC denied being near the scene but after being repeatedly accused of lying he agreed
        • Constant pressure and was denied a solicitor
      • This is a case of a coerced compliant false confession (he gave into pressure during the interviews in order to escape the situation


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