This article is from the PE and EIT Exams FAQ, by Ron Graham ecaxron@ariel.lerc.nasa.gov with numerous contributions by others.
o Expert witnesses: a PE can offer expert opinion as to what
caused (for instance) a structural failure. This is the
same as for a police officer, firefighter, physician, or
anyone else (again) who deals with the public safety.
o Expert investigator: in many states, a PE can be called upon
to determine the cause of (for instance) arson. This is, once
again, in relation to the public safety. [Venable]
 
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