The main psychological premise behind profiling is that there will be consistency between the way offenders act at the crime scene and who they are. ... Individual differentiation aims to establish differences between the behavioral actions of offenders and uses this to identify subgroups of crime scene types.
While very few studies (two, to be exact) have measured the impact of offender profiling in the field, several studies examined profiling's accuracy through other methods. ... Results of the famous “Coals to Newcastle” study found that the predictions made by profilers were accurate about 66% of the time
