PSYC2361 Episode 1 Study Guide: Criminal Profiling

ASSESSMENT TARGET AND SOURCE HIERARCHY

• The 2026 Blackboard transcript and reference list are the authoritative course materials. Public YouTube videos may differ as materials have evolved.

• Core content is the assessable priority; recommended material provides supporting depth; optional material is not assessable.

• The course prepares students for $30$-minute, closed-book short essays.

THE FOUR RUBRIC DIMENSIONS

• Argument: Answers the exact question from the first sentence, making the direction of the response obvious.

• Use of research evidence: Selection of the strongest and most relevant studies, providing only the necessary method and findings for the argument.

• Application of research evidence: Explaining why a study fits or does not fit and what that means for the conclusion in the specific case.

• Conclusion: Delivering a direct recommendation or judgement without introducing new evidence.

CENTRAL LESSONS AND ONE-PAGE EPISODE SUMMARY

• Profiling should generate cautious, testable investigative priorities. It should not be treated as proof, used to exclude people who do not match a "typical" profile, or allowed to displace forensic evidence, witness evidence, and ordinary investigation.

• The central question of the episode asks if investigators can infer useful characteristics of an unknown offender from actions during the offence and the reliability of such inferences.

• Offender profiling begins with the crime, victim, location, and offender actions to infer likely characteristics.

• FBI Criminal Investigative Analysis (CIA): Experience-based approach moving from WHAT happened to WHY it happened to WHO committed it. It utilizes concepts like organized, disorganized, and mixed crime scenes, as well as motive, modus operandi, signature, and staging.

• Investigative Psychology (IP): Aims to make the inference process systematic by statistically analyzing larger sets of solved crimes. It focuses on the association between offender actions and characteristics rather than speculative motives.

• Salfati and Canter ($1999$): Identified three homicide themes: expressive-impulsive, instrumental-opportunistic, and instrumental-cognitive. These are probabilistic patterns, not deterministic categories.

• Canter’s Five Factors: Interpersonal coherence, time and place, forensic awareness, criminal career, and criminal characteristics.

• Geographic Profiling: Estimates where an offender may be based using principles like least effort, distance decay, buffer zones, mental maps, and the marauder/commuter distinction.

• The Outlier Problem: Statistical or experience-based profiles describe what is typical, but a current offender may not be typical.

CORE CONTRAST: CIA VS. INVESTIGATIVE PSYCHOLOGY

• Criminal Investigative Analysis

  • Main Path: WHAT $→$ WHY $→$ WHO.

  • Knowledge Base: Profiler experience, case reconstruction, interviews with convicted offenders.

  • Typical Output: Demographics, personality, motivation, habits, interview strategy.

  • Strength: Rich case-level interpretation and practical detail.

  • Weakness: Rules linking scene to offender may be unclear, subjective, and weakly validated.

• Investigative Psychology

  • Main Path: WHAT/action patterns $→$ probable WHO and WHERE.

  • Knowledge Base: Larger solved-case datasets, coding, and statistical analysis.

  • Typical Output: Probabilistic offender characteristics, behavioural themes, likely location.

  • Strength: More transparent, replicable, and open to peer review.

  • Weakness: Associations are imperfect, sample-specific, and may fail for an outlier.

DRAMA AND CASE EVIDENCE: JANINE JENKER CASE

• Known Facts

  • The victim attended a gym class and was found near an alley/overpass area.

  • Two witnesses: one saw and chased a runner; one was a distressed young gym employee not yet fully interviewed.

  • A nearby CCTV camera was broken.

  • A duffel bag contained unused, widely available gym clothes; the bag was clean.

  • A rope with a single-column knot was found, but it did not match threads from the scene, making its connection uncertain.

  • The victim appeared to have fought back; knife wounds were present.

  • Detective predictions: One proposed a male in his early-to-mid $30$s, a first-time offender, involving thrill-seeking escalation or robbery; another detective suggested a woman.

• Cautious Inferences

  • Multiple wounds and struggle may be consistent with an expressive-impulsive pattern, but transcript details are too limited for confident classification.

  • A disorganized-looking scene can reflect an unplanned offence or an organized plan disrupted by resistance. "Panic" is an interpretation, not a fact.

  • Absence of forensic cleanup might suggest low forensic awareness, but could also mean the offender was interrupted or evidence removal was undetected.

  • The knot indicates knowledge only if the rope is first established as connected to the offence.

  • One location cannot establish a serial spatial pattern for geographic analysis.

• Claims Not Supported Currently

  • Confident inference of male gender or a specific age range ($30$s).

  • Conclusion that it was a first crime or specifically motivated by sex, thrill, or robbery without objective evidence.

  • Conclusion that the rope, bag, or clothing belonged to the offender.

  • Use of geographic profiling to identify a home from a single location.

VIDEO-BY-VIDEO LECTURE NOTES

• Video $1.1$: Introduction

  • Profiling is used when forensic results are delayed or eyewitness info is limited.

  • Washington Sniper Example: Profilers disagreed on the number of offenders, location, and demographics. Offenders were caught through a communication linked to a fingerprint from an earlier offence, not a profile. This shows the same crime info can produce inconsistent profiles.

• Video $1.2$: Profiling Methods

  • Organized Scene: Planning, restraints, brought weapon, evidence removal, socially competent/higher-functioning offender.

  • Disorganized Scene: Little planning, improvised weapon, evidence left, socially isolated/lower-functioning offender.

  • Mixed Scene: Both features; can result from disruption, resistance, multiple people, or evolving methods.

  • Modus Operandi (MO): Functional method to carry out the offence; can change with learning.

  • Signature: Behaviour unnecessary for the offence that meets a psychological need.

  • Staging: Deliberate alteration to mislead investigators.

• Video $1.3$: Professional Profilers

  • Pinizzotto and Finkel ($1990$): Tested profilers vs. detectives, psychologists, and students. Profilers wrote richer/longer profiles and were more accurate on written predictions. On multiple-choice/ranking, the profiler advantage held for the sexual offence but not for the homicide case. No qualitative difference in processing was found.

• Video $1.4$: Investigative Psychology

  • Salfati and Canter ($1999$): Analysis of solved stranger homicides using co-occurrence analysis.

  • Expressive-Impulsive: Aggression to hurt victim, multiple injuries, varied weapons.

  • Instrumental-Cognitive: Planning, concealment, removing body/weapon/evidence.

  • Instrumental-Opportunistic: Using victim to obtain property or sex.

  • Canter’s Five Factors: Interpersonal coherence (interaction style reflects life); Time and place (familiarity/routine); Forensic awareness (avoiding detection); Criminal career (continuity); Criminal characteristics (matching current offence to empirical data).

• Video $1.5$: Geographic Profiling

  • Least Effort: Choosing the easier/closer option.

  • Distance Decay: Frequency decreases as distance from base increases.

  • Buffer Zone: Avoiding crimes extremely close to home due to recognition risk.

  • Mental Maps: Subjective city representations shaped by routine.

  • Marauder: Operates outward from a home base within the offence region.

  • Commuter: Travels away from the home area to a separate offending region.

  • Canter and Larkin ($1993$): Supported marauder model for serial sexual assault.

  • Meaney ($2004$): Showed patterns vary by crime type (burglary vs. sex offence).

  • Rossmo ($2000$): Requires approximately $5$ distinct linked locations; one location is unsuitable.

CORE REFERENCE DOSSIERS

• Canter ($1994$), Criminal Shadows: Book format. Illustrates IP using the John Duffy case. Strength: practical clarity. Limit: retrospective success doesn't establish general accuracy.

• Canter ($2003$), Mapping Murder: Supports the five-factor framework. Identifies questions rather than providing certain answers. Highlights that interpersonal actions reveal offender experience.

• Canter and Alison ($2000$), Profiling Rape and Murder: Conceptual source. Frames IP as an objective, statistical analysis vs. intuition. Useful for the CIA vs. IP methodological contrast.

• Canter and Larkin ($1993$), The Environmental Range of Serial Rapists: Archival study of $45$ British male sexual assaulters. $87\%$ were marauders; $91\%$ had the base within the offence circle. Distance correlation $r = .93$. Evidence for circle theory.

• Canter and Youngs ($2009$), Investigative Psychology: Theoretical framework. Connects offending locations to mental maps and routine activities. Explains why commuters cluster offences separately.

• Douglas et al. ($2013$), Crime Classification Manual: Codifies CIA. Focuses on classification, reconstruction, and motive. Defines signature and staging. Strength: operational relevance. Weakness: subjective classification.

• Hazelwood and Warren ($2001$), The Sexually Violent Offender: Explains mixed scenes. Organized fantasy can become a disorganized enacted crime due to resistance or disruption. Relevant to Janine fighting back.

• Meaney ($2004$), Commuters and Marauders: Archival study using Australian NSW Police records. Found only $35\%$ of burglars were marauders vs. $93\%$ of sex offenders. Proves circle theory cannot be applied uniformly across crime types.

• Pinizzotto and Finkel ($1990$), Criminal Personality Profiling: Exp. total $n = 28$ ($4$ FBI experts, $6$ trained police, $6$ detectives, $6$ psychologists, $6$ students). Studied one homicide and one sexual offence. Profiler advantage for sexual offence only on objective scores.

• Ressler and Burgess ($1985$): FBI foundation. Interviews with $36$ convicted sexual murderers. Limitations: volunteer/convicted sampling, small sample size, retrospective report, and limited independent validation.

• Rossmo ($2000$), Geographic Profiling: Framework for geographic prioritization. Requires approximately $5$ locations. Fails if crimes are wrongly linked or if the offender relocates.

• Salfati and Canter ($1999$), Differentiating Stranger Murders: Archival study of $82$ solved British stranger homicides. Variables occurring in over $90\%$ or under $10\%$ were removed. Smallest Space Analysis identified expressive and instrumental themes. Only $53$ cases had a dominant theme.

RECOMMENDED AND OPTIONAL CONTENT

• FBI Origins: Robert Ressler and John Douglas interviewed killers. Ann Burgess formalised it into a $488$-item, $57$-page instrument. Not a representative research program.

• The Mad Bomber: Psychiatrist James Brussel profiled George Metesky in the $1950$s with striking accuracy (blue double-breasted suit). It is an historical anecdote, not evidence of systematic accuracy.

• Kocsis ($2003$): Meta-analysis of profiling studies using standardized $z$-scores. Profilers had highest average performance but high variability. Group sizes were small ($n = 11$ experts).

• Smallest Space Analysis (SSA): Non-metric multidimensional-scaling. Co-occurring behaviours are placed near each other. High-frequency behaviours appear centrally.

• Salfati and Sorochinski ($2021$): Analysis of $83$ serial homicide series with $512$ scenes. Identified subtypes: habitual criminal, troubled client, young impulsive. $75\%$ of offenders were classifiable; $25\%$ were hybrids.

• Racial Profiling: Differs from post-offence profiling by targeting people before a crime based on stereotypes. Leads to self-fulfilling statistical patterns and community alienation.

EXAM-READY MEMORY SHEET

• Pinizzotto & Finkel ($1990$): $28$ participants ($4$ groups of $6$). $2$ cases. Advantage for sexual offence, not homicide.

• Salfati & Canter ($1999$): $82$ stranger homicides. $48$ variables ($30$ in SSA). $53$ dominant cases ($21$ expressive, $16$ cognitive, $16$ opportunistic).

• Canter & Larkin ($1993$): $45$ serial sexual assaulters. $87\%$ marauders. $91\%$ circle base. $r = .93$ distance relationship.

• Meaney ($2004$): Marauders: Burglars $35\%$, Sex offenders $93\%$.

• FBI Origin Study: $36$ killers. $488$-item instrument. $57$ pages.

• Rossmo ($2000$): Need roughly $5$ locations.

KEY DEFINITIONS

• Offender profiling: Inferring probable offender characteristics from offence, victim, and location information.

• Modus operandi: Functional behaviour needed to commit or complete the offence; can change.

• Signature: Behaviour unnecessary for completing the offence that may satisfy a psychological need.

• Staging: Deliberate alteration of the scene to mislead investigators.

• Interpersonal coherence: Continuity between the offender’s interactional style in ordinary life and during offending.

• Forensic awareness: Behaviour indicating knowledge of detection methods and attempts to avoid leaving or preserve evidence.

• Distance decay: Offending generally becomes less frequent farther from the offender’s base.

• Buffer zone: Area close to the base where the offender may avoid offending to reduce recognition risk.

• Marauder: Offender whose home base lies within or near the offence region.

• Commuter: Offender who travels from the home area to a separate offence region.

• Smallest Space Analysis: A method that represents co-occurring variables close together in a spatial plot.

QUESTIONS AND DISCUSSION

• What is the difference between an observed crime-scene fact and a profiler’s interpretation? A fact is the observed evidence (e.g., wounds); interpretation is the meaning assigned (e.g., "panic").

• Why did the Washington sniper example challenge confidence in profiling? Because public profilers were inconsistent and the arrest came from traditional fingerprint evidence, not the profile.

• What does WHAT–WHY–WHO mean? The sequence used by CIA to move from actions to motives to identification.

• Why can a mixed scene occur even when an offender planned the crime? Hazelwood and Warren explain that victim resistance or unexpected events can disrupt the planned organization.

• On which case did profilers show the clearest objective advantage, and on which did they not? Advantage found in sexual offence cases; none found for homicides in the Pinizzotto and Finkel ($1990$) study.

• Why is geographic profiling unsuitable for the Jenker case at this stage? Because one location ($n = 1$) is insufficient to establish an activity space or distance decay patterns.