| http://www.w3.org/ns/prov#value | - The envelope and the letter could be subjected to thefollowing exams, in order: Disease diagnosis, to determine whether it really contains the suspected contagion Trace evidence, for hairs or ???bers in the envelope or stuck to the adhesives (stamp, closure, tape used to seal it) DNA, from saliva on the stamp or the envelope closure Questioned documents, for the paper, lettering, and other aspects
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