Legal Myths Saga…DNA evidence is infallible.
“This is true to a point. DNA comparison, when properly conducted by an honest, trained professional will invariably reach the correct result. But the integrity of the result depends on a variety of factors that are, unfortunately, not nearly so foolproof: the evidence must be gathered and preserved so as to avoid contamination; the testing itself must be conducted so that the two samples being compared do not contaminate each other; the examiner must be competent and honest. As numerous scandals involving DNA testing labs have shown, these conditions cannot be taken for granted, and DNA evidence is only as good as the weakest link in the chain.” (Hon. Alex Kozinski)
Ninth Circuit judge Alex Kozinski wrote a seminal paper on how investigators, prosecutors and courts put defendants at an extreme and unjust disadvantage.