Transcript John Potts Metropolitan Police, University of Portsmouth

John Potts
Dr. Becky Milne
University of Portsmouth
A PILOT STUDY INTO THE USE OF
ENHANCED COGNITIVE INTERVIEW
TECHNIQUE
TO DEBRIEF POLICE INFORMANTS &
AGENTS
Regulation Of Investigatory
Powers Act 2000






Introduced legislation on Conduct and Use of
informants.
Introduced a chain of command for the protection
of police and the informant and defined the
following:
CHIS.(Covert Human Intelligence Source)
Handler.
Controller.
Authorising Officer.
How is the CHIS currently
debriefed?

Not seen as a witness.
 Standard Interview. (Fisher et.al1987)
 Why not use ECI?
Aims and Objective of the
Study.
1.
2.
What is the standard interview and how
productive is it in the area of informants?
Does the ECI get better information
compared to a SI in an informant
scenario?
Method

Interviewees / informants: military students.
 Event: 4 minute video.
 Interviewers: experienced informant
handlers.
 Within subject design.
Scoring and Coding

Correct
 Incorrect
 Confabulation.

Person.
 Action
 Surroundings
 Object
Results 1
Correct
ECI
N =10
487
SI
N = 10
245
Incorrect
85
39
Confabulation 100
47
Results 2
ECI
SI
Correct
Incorrect
Confab
Correct Incorrect
Confab
Person
143
52
38
72
7
3
Object
71
5
8
99
22
34
Action
149
18
27
28
3
2
Surr’in
124
10
27
46
7
8
Total
487
85
100
245
39
47
Conclusions 1

ECI produces more correct information than
the SI in:
– Persons
– Actions
– Surroundings
Conclusions 2

ECI > incorrect details in:
– Person
Conclusions 3

ECI > Confabulations in:
– Person
– Actions
John Potts
Metropolitan Police,
University of Portsmouth
E-Mail
[email protected]
Dr. Becky Milne
University of Portsmouth