A major part of the daily work for the police and other forensic service providers is the recording and analysis of trace evidence left at crime scenes. Two important types of trace evidence are footwear and tyre track impressions. This evidence can be used to both inform investigations and as a basis for expert opinion evidence in criminal proceedings. It is evidence towards identifying the criminal(s) at crime scenes. The most common operational methods to record such traces are through plaster casting (3D evidence) and photography (2D evidence). Both methods have a number of disadvantages, just to name a few: plaster casting requires a considerable amount of time and destroys the trace; and photography provides no depth information. This can lead to the evidence, particularly the 3D evidence, not being collected and therefore not being available to inform criminal investigations or to support criminal prosecutions. Read More