“DNA is a lot easier to plant at a crime scene than fingerprints. We’re creating a criminal justice system that is increasingly relying on this technology.” - Tania Simoncelli, science adviser to the American Civil Liberties Union
Scientists in Israel have demonstrated that it is possible to fabricate DNA evidence, undermining the credibility of what has been considered the gold standard of proof in criminal cases.
To all those who think Governor Martin O'Malley wanting to build up a DNA sample bank can't be twisted for nefarious purposes, you need to read this story closely.
The scientists fabricated blood and saliva samples containing DNA from a person other than the donor of the blood and saliva. They also showed that if they had access to a DNA profile in a database (like the one O'Malley is trying to build), they could construct a sample of DNA to match that profile without obtaining any tissue from that person.