DNA evidence is invisible and remarkably easy to transfer,
making it possible for a sample to be spilled or even planted on a piece of
evidence.
Boise State University professor Greg Hampikian is known
internationally for his work in DNA forensics, and he has developed a solution
that permanently marks DNA samples to prevent contamination. Hampikian has used
nullomers, the smallest DNA sequences that are absent from nature, to create
the DNA bar code.