Abstract:
This study investigated the evidential value of specific
methods of analysis for packaging tapes and clear adhesive
tapes available in Australia. Fifty-eight adhesive tapes were analyzed
using a wide range of optical. physical, and chemical techniques.
The results were collated for the purpose of creating an Australian
database of adhesive tapes, which would be of assistance in
criminal investigation. Each technique was evaluated for its discriminating
power, both for comparative purposes and for the identification
of adhesive tapes by comparing unknown samples with the
database. The combined discriminating power of the techniques applied
is very high. It is possible to individually identify the source of
an unknown adhesive tape sample in many instances by searching
the database. It is also possible to form an opinion on the significance
of a failure-to-discriminate result in comparative casework. Further
work is still needed to expand and update the database, as well as
compiling data on the relative market share of various products.
