AO1

• The bottom up approach aims to generate a picture of the offender eg likely characteristics, routine behaviour and social background through systematic analysis of evidence at the crime scene
• investigative psychology

  Applying statistical procedures alongside psychological theory to analyse evidence, aim is to establish patterns of behaviour that are likely to occur or co-exist across crime scenes
• investigative psychology

  Develop a statistical database which acts as a baseline for comparison, details of offences can be matched against the database to reveal details about the offender eg personal history family etc. It determines whether a series of offences are linked to one person
• geographical profiling

  Uses information from linked crime scenes to identify the approximate base location or home of an offender
• geographical profiling

  Crime mapping: principle of spacial-consistency (people commit crimes within a small area) can help identify centre of gravity of the offences 
• geograhical profiling

  Canter and Larkin's circle theory - marauders commit crimes close to base, commuters commit crimes at a distance from their base which helps to reveal important factors about them