Bringing Criminals to Heel
The perfect crime is all but impossible because every criminal leaves at least a trace of evidence at the scene.
These can be fingerprints, microparticles, DNA material or, more commonly, shoe prints. Such prints are difficult to avoid, especially for burglars. Therefore, they often provide substantive evidence and are an important tool for police in solving property crimes and other offenses.
In the course of its lifetime, every shoe sole develops a unique structure (Figure 1) that is...
Photonics Spectra, June 2008