Offender profiling

Those investigating crimes have always tried to formulate some idea of the
characteristics of unknown culprits as an aid to finding and convicting them.
This parallels the generals of Ancient Rome building a picture of the Barbarian
leaders they would face in battle. It is therefore not surprising, as discussed by
Canter (1995a), that as long ago as 1888, when Jack the Ripper stalked the
streets of London, some attempt was made to produce a description of the
person who had committed these still unsolved crimes.