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Canter et al: Investigation of the organiseed/ dis

Aim: Test relibailty organised/ disorganised typologies 

Method: Content analysis using 100 cases to found out if the features hypothesised belong to each typology would be consistently and distincly differed. The cases came from published accounts of serial murders in the use and were cross-checked with court reports and officers. The third crime committed by each serial killer in each series was analysed for research. The crime classification manual was used to classify the crimes as organised or disorganised 


  • Twice as many disorganised as organised crime scene action were identified 
  • Only two crimes-scene behaviours co-ourred in the orgainsed typologies which where the body was concelaed in 70% of cases and sexual activity occured in 75% of cases 
  • Only sex acts and vaginal **** occur in more than 2/3 of disorganised cases 
  • Further stastical analysis failed to seperate the two sets of variables 

Conclusion: Canter concludes that instead of there being distinction between two types of serial murder, al such crimes will have an organised element to them, as we might expect from the fact the killers were not caught after three killings 

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The case of John Duffy

  • Born 1959, raed and murdered women at railway station in and around London 
  • Convicted in 1988 for two murders and five rapes but later admitted to 25 offences 
  • David Mulcahy (childhood friend) was later found to be involved 13 years after Duffy was convited - it came out in a counseling session - Duffy testified against him 
  • DNA evidence alos linked hum to the case - advances in forensic analysis 

Canter's porfile and his circle theory of crime 

  • Canter became involved in the early 1980's and drew up a table of the cases chronologically 
  • Two main themes he looked at ; - relationships between the offender and the victim - Amount of dominance and control that was used 
  • Canter looked at the evidence for each case, placing the cases, placing the cases on a map and overlaying each year on an acetate film - distinctive patterns in the locations and types of crimeswere identified - known as his 'circle theory of crime' 
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