Courtroom Graphics and Visual Aids by Philip J. O'Keefe, PE

The forensic engineering inspection photograph to the left shows an electrical trigger switch mechanism inside of a power tool handle.  This visual image could be improved by retouching and annotating the photograph, but things would still appear unclear due to the lack of distinction between the shapes in the trigger mechanism and the handle.

In this situation, technical illustration techniques most effectively illustrate

only the components with relevance to the case.  The result is an easy-to-follow three dimensional drawing:

Trigger Mechanism Visual Aid Example
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Philip J. O'Keefe

Licensed Professional Engineer,

Visual Artist, and

Scale Model Builder