A “Toolbox” for Forensic Engineers

90 Forensic Materials Engineering: Case Studies
Figure 4.2 Undisturbed road dirt layer on a wheel rim (A), compared with
impressed markings transferred from the wheel hub to the wheel (B).
sense approach along with a refusal to jump to conclusions. This can mean
a long and often tedious examination of the evidence left by an accident.
Other debris may hide critical trace evidence, for example. Observations
made at the scene must be chronicled, usually with the aid of sketches, note
taking and photography of the debris. The more complex the debris field,
the greater the need for multiple images of the remains, so that the final
resting position of key components is recorded. Such activity is essential
before laboratory analysis.
4.4 Inside the Toolbox
After site inspection, gathering relevant information and collecting failed
samples, what range of methods are available for analysis of samples? The
forensic engineer has a variety of apparatus and inspection techniques that