1. Topic 3: Collection of evidence

2. Background: Collection and use of evidence from witnesses and suspects
How do we collect evidence from witnesses and suspects?
Ask them!
If someone says they committed the crime, is this a reliable source?
What factors may influences someone to say they have committed a crime if they haven’t?
Let’s recap: Loftus and Palmer study – what is one conclusion from this?
Leading questions influence memories

3. Here’s an example…

4. How is evidence collected from witnesses?
Background: Collection and use of evidence from witnesses and suspects
How is evidence collected from witnesses?
Read the Reid technique
There are several ways in which police can collect information including…
Identity parades
Identikits
The most important technique used is the interview
The Standard Interview (SI)
The Cognitive Interview (CI)
The Enhanced Cognitive Interview (ECI)

5. Background: Collection and use of evidence from witnesses and suspects
Key research: Memon and Higham (1998) A review of the cognitive interview
Application: one strategy for police interviews

6. Key research: Memon and Higham (1998) A review of the cognitive interview
Read through the front side of A3
Read model essay answer
Complete task 1
Application: Strategies for police interviews
Use p150 in textbook for ‘PEACE’ and ‘Forensic hypnosis’
Complete task 2
Complete task 3
Complete task 4

7. Background: Collection and use of evidence from witnesses and suspects
Key research: Memon and Higham (1998) A review of the cognitive interview
Application: one strategy for police interviews