salfati april 2013 pa forensic workshop - participant handbook

8/13/2019 Salfati April 2013 PA Forensic Workshop - Participant Handbook

1/28

C. Gabrielle Salfati (2013)

Investigative Psychology Unit (IPRU)

Criminal Profiling& Sex Offending

Pennsylvania Forensic AssociatesApril 19th2013


2/28



(

&

(

&

&

&


3/28


4/28


5/28



()

,

.

, , () 1976 2007 132 (.., ,

, ),

:

I (E )

Claim

The murderer is

under 30 years

Backing

Research by X (date)

Warrant

Majority of offenderswho murder women under 35 yearsare themselves 30 year old

Grounds

Because thisis the murderof a 23 yearold woman

Modality

87% chance that...

11(Alison, Smith, Eastman & Rainbow, 2003)

Extent to which we can rely on this information

(rather than probably, possibly etc.)


6/28



A IA (BIA)

20052007 E (, , & , ) 47 , 805 ( 305 )

96% , 63%

B 34%

C

K (BIA)

H,

:

? A ,

?

?

Type 1

Type 2

Type 3

Characteristics

Actions

13

I D

B CE

AC,

. C & B, 1990


7/28



People dont always act the same way every time

Behaviour is situation influencedBehaviour changes over time

E.g. Duffy the Railway rapist

Linking

Need to understand influence of situation on behavior& how can be seen at crime sceneLook at the psychological meaning of the behavior

15

10 GAGGED

11 BD

Is this last victim part of the same series?

16

The Science

CONTROLLING PSEUDO INTIMATE

C P

17


8/28



Canter 2000

1 - 2 - 3 1 - 2 - 3

A C

, , & , .

Evaluation:

Are subgroups distinct?

Key issues:oMotivation basedoMeasures that discriminateo Frequencies largely overlooked in classification

workoNo practical classification criteria


9/28



o Role of frequencies largely overlooked inclassification work

o Need to provide guidelines for:

- Measurement

- Individual differentiation

- Criteria for classification

(C, 2000)

(C, 2000)

(2003)H C

I


10/28



(C, 2000)

(2003)

73% B60% B .. CA !

(C, 2000)

H ?

H , ?

H IF ?

H ?

H D

26

(Based on Salfati& Canter 1999 model


11/28


12/28



&

D & FBI

IPRU POLICE TRAINING


13/28



(A) (C)

Offender Profiling

A1 A2 A3 ... C

A1 A2 A3 ... C

Behavioral Consistency


14/28



,

( )

://..///

5 days

135 subject matter experts

10 countries, 5 continents

Law Enforcement

Prosecution & Defense

Media

Academics Clinicians

38,500,000

21,400,000

17,800,000

8,640,000

28,900

20,500

23,000

18,600 36


15/28



22 /

,

3 & &

?

?

?

C & C

& & &

&

C & , 1987; , 1991,, 1991

A . 2007


16/28



B B

.. C . 2004,

B E ( ) ( )

C

D & E

?C

Individual behaviorPsychological type/theme

DescriptivePsychological

May increase chances of e.g. linking

The Influence of the Unit of Analysis

Key Questions

oDo offenders always engage in the same behaviors across e.g. their series?

oUnit of analysis we use, may affect the nature of the results we obtain


17/28



2

:1. 2.

B (2007) () C C 1/6

B (2005) (2613%)

The Influence of the Unit of Analysis

C

E


18/28



( )

" "


19/28



,

1. ' " "

2. "

1.

2. 3.

,


20/28


21/28



&

56

() +, &

, &

57

& (

) &

+


22/28



1.

2. E

3. A

59

E

A

C

C ..

60


23/28



61

&

C

C( )

DE

62

63


24/28



1880s - First known profile of aserial killer by Police surgeon Dr.Thomas Bond in the UK

65

66

The plan was I wanted to kill as many women Ithought were prostitutes as I possibly could. Ipicked prostitutes as my victims because I hate

most prostitutes and I did not want to pay them forsex. I also picked prostitutes as victims becausethey were easy to pick up without being noticed. Iknew they would not be reported missing rightaway, and might never be reported missing. Ipicked prostitutes because I thought I could kill asmany of them as I wanted without getting caught


25/28



(, , )

7382%* 3768%

67(* , 2009 )

19982000, 2.7% ()

60120 (C)

()

69% 10 ()

68

35%

( , )

69


26/28


27/28



73(Canter & Heritage 1990)

74

() (

?)

&


28/28

77

salfati april 2013 pa forensic workshop - participant handbook

Documents