In this forensic science video, Mark Boulter teaches you how to dust for footprints at a crime scene. When someone takes a step, a footwear impression may be left behind on the surface.
A recovered shoe impression may yield a vast amount of information to forensic scientists and scene of crime officers. Almost all items of footwear will bear an undersole with distinctive, and sometimes unique, patterns. Information may be imparted from the manufacturing process or general wear.
As a shoe is worn certain details fade in different places, depending on the weight and walk of the wearer. What's more, the size of the shoe, which may easily be obtained by examining the recovered impression, may prove useful.
This technique is taught on our Forensic Science courses.