Criminal Major Case Management: Persons of Interest Priority Assessment Tool

258 Pages·2012·3.43 MB·English

by  Larry Wilson

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C M Y CM MY CY CMY K
FORENSICS & CRIMINAL JUSTICE
CRIMINAL MAJOR CASE MANAGEMENT
Persons of Interest Priority Assessment Tool
(POIPAT)
In high-profile investigations, when the suspect pool is very large, resources are unduly
strained unless the pool can be narrowed down to the most likely offenders. The Persons of
Interest Priority Assessment Tool (POIPAT) provides an objective and consistent means of
establishing a priority ranking of suspects or persons of interest in any investigation. Created
and used correctly, the tool can determine if any suspect/POI should be considered a high,
medium, or low investigative priority, saving time and resources and potentially saving
additional victims.
Criminal Major Case Management: Persons of Interest Priority Assessment Tool (POIPAT)
describes how to set up a POIPAT system for any investigation where there are numerous
POIs and limited resources. Using the unsolved Jack the Ripper murders as a sample case
study, it walks readers through the steps of creating and using the POIPAT system.
The book begins by providing an overview of offender profiling and the basic considerations
for developing elements for a POIPAT. It explains the Element Weighting Chart (EWC) and
discusses how many points each element should be weighted based on its level of importance.
The author describes how to determine what point totals constitute a high, medium, or low
priority so that detectives can know how best to direct their resources. He also discusses
tracking how POIs are eliminated through an elimination coding system, thereby avoiding
potential duplication and allowing investigators to home in on the person most likely to have
committed the crime.
Finally, the book uses the POIPAT system to draw conclusions about some of the best-known
suspects who were most likely to have been the real Jack the Ripper. Seeing how the technique
is used in a real case, investigators will discover how to effectively create unique POIPATs
for their own cases. The included CD-ROM contains a template that can be modified for
any type of investigation and a number of additional tools and guides.
Includes K14316
Companion
CD-ROM
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Wilson CRIMINAL MAJOR CASE MANAGEMENT
CRIMINAL
MAJOR CASE
MANAGEMENT
Persons of Interest
Priority Assessment Tool
(POIPAT)
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CRIMINAL
MAJOR CASE
MANAGEMENT
Persons of Interest
Priority Assessment Tool
(POIPAT)
Larry Wilson
Boca Raton London New York
CRC Press is an imprint of the
Taylor & Francis Group, an informa business
Inspector Larry Wilson of the Royal Canadian Mounted Police.
CRC Press
Taylor & Francis Group
6000 Broken Sound Parkway NW, Suite 300
Boca Raton, FL 33487-2742
© 2012 Her Majesty the Queen in rights of Canada, 2012, as represented by the Royal Canadian Mounted
Police.
CRC Press is an imprint of Taylor & Francis Group, an Informa business
No claim to original U.S. Government works
Version Date: 20120215
International Standard Book Number-13: 978-1-4398-9862-8 (eBook - PDF)
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Contents
CD Contents xi
Preface xiii
Acknowledgements xv
About the Author xvii
Section I
The POIPAT SySTem: InTrODuCTIOn TO
The POIPAT SySTem
1 Introduction 3
Applying the POIPAT to Cold Cases 4
History of POIPAT 5
Te Process 7
New POIs 8
Previously Identifed POIs 9
Investigators 9
POI versus Suspect 10
Exceptions to Use of POIPAT 11
Accuracy/Reliability of POIPAT 11
Who Should Create the POIPAT? 12
Who Should Assess POIs Using the POIPAT? 13
POIPAT Instructional Assessment Guide 13
POIPAT Development Tools 14
Endnote 14
2 Profling and the POIPAT 15
Insp. pIerre nezan
Introduction 15
History of Profling 16
Organized versus Disorganized 17
Importance of Fantasy (Ritual) versus MO 21
Conclusion 25
Endnotes 25
v
vi Contents
3 POIPAT element Development Basic rules 27
Introduction 27
Conclusions about the Ofender Based on Inferences 27
Sources of POIPAT Elements 28
Number of Elements 29
Objective versus Subjective Elements 30
True or False Elements 31
Salient Elements 32
4 POIPAT element Weighting Guide 33
Introduction 3
Element Weighting Chart (EWC) 33
Textual Importance Scale 34
Unimportant 35
Less Important 35
Important 36
Very Important 37
Salient Elements 37
Other Factors Afecting Element Weighting 38
Availability/Accessibility of Information 38
Frequency/Uniqueness of the Element in the Population 39
Subjectivity of the Information 40
Reliability of Source 40
Endnote 41
5 establishing Priority Levels’ Points ranges 43
Introduction 43
Identify and Score POIs 43
Doing the Calculations 44
Plugging in the Names with POIPAT Scores 45
Identifying Priority Ranges 46
Conclusion 47
6 Standard POIPAT elements Library 49
Introduction 49
Te Heading 49
Geography 50
Ofender’s Residence 51
Ofender’s Comfort Zone(s) 52
Physical Description 54
Contents vii
Age 56
Gender 56
Race/Ethnicity/Skin Colour 57
Acent 58
Speech Characteristics 59
Lifestyle 59
Marital Status 60
Employment 61
Education 62
Criminal History 63
Links to Victim(s) 64
Links to Victim(s) in Investigations with Numerous Victims 66
Availability of POI 66
Availability of POI in Investigations with Numerous Victims 68
Vehicle 69
Other Elements 70
Comments Section 71
Te End Section 72
Endnotes 73
7 POI elimination Status Coding System 75
Introduction 75
Process of Elimination 75
Benefts of Elimination Status Coding Systems 76
Revised Elimination Status Coding System 77
A—Conclusive Elimination 77
B—Supported Elimination 78
C—Unsupported Elimination 79
D—Couldn’t Be Eliminated 79
Conclusion 80
Endnote 80
Section II
JACk The rIPPer—CASe STuDy
8 Jack the ripper—Investigations 83
Introduction 83
Investigational Overview 84
Mary Ann Nichols 85
Annie Chapman 86
viii Contents
Elizabeth Stride, aka ‘Long Liz’ 87
Catherine Eddowes 88
Mary Jane Kelly 90
Endnote 92
9 Jack the ripper—Criminal Profles 93
Introduction 93
Dr. Tomas Bond 93
FBI Supervisory Special Agent (SSA)—John E. Douglas
(Retired) 94
Endnote 95
10 Creating the Jack the ripper POIPAT 97
Introduction 97
Te Heading 97
Geography Elements 97
Residence Section 98
Comfort Zone Section 99
Physical Description 99
Lifestyle 102
Marital Status 104
Employment 105
Education 107
Criminal History 107
Links to Victim 108
Availability 109
Weapon 10
Other 10
Comments 12
Te End Section 112
Endnotes 13
11 Jack the ripper POIPAT Instructional Guide 115
Introduction 15
Methodology 15
General Rules 116
POIPAT Element Assessment 116
Residence 17
Comfort Zone 117
Physical Description 117
Contents ix
Lifestyle 18
Marital Status 119
Employment Status 119
Criminal History 120
Linked to Victims 120
Availability 121
Weapon 121
Other 12
Comments 12
Te End Section 122
12 Jack the ripper Suspects 125
Introduction 125
Tomas Hayne Cutbush 126
Montague John Druitt 127
Sir William Withey Gull 128
Severin Antoinovich Klosowski, aka George Chapman 130
Aaron Kosminski 133
Michael Ostrog 135
John Pizer, aka Leather Apron 136
Walter Richard Sickert 138
Dr. Roslyn D’Onston Stephenson (Dr. Robert Donston
Stephenson) 141
Francis Tumblety 143
Endnote 146
13 Scoring the Jack the ripper Suspects 147
Introduction 147
Tomas Hayne Cutbush 148
Montague John Druitt 151
Sir William Withey Gull 154
Severin Antoinovich Klosowski, aka George Chapman 157
Aaron Kosminski 161
Michael Ostrog 164
John Pizer, aka Leather Apron 167
Walter Richard Sickert 172
Dr. Roslyn D’Onston Stephenson (Dr. Robert Donston
Stephenson) 176
Francis Tumblety 179
Conclusion 182