Pollen rain refers to the fact that pollen which is
produced by all plants that have flowers and conifers is ubiquitous in
nature.
Pollen is found on almost everyone, clinging on to
hair, skin and clothing. This has made it a tool for forensic investigation and though
not as popular and developed as other methods, is gaining popularity and rapid advances
are being made in its use. A couple of cases have been solved using pollen rain present
on potential suspects.
As pollen is not destroyed over a
long period of time it can be used even when investigating murders of people where only
the bones remain. The presence of a unique kind of pollen everywhere which varies with
the plants that grow there and the difficulty that a person under investigation would
have in eliminating all the samples present on him also make it an attractive forensic
tool.
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