all your DNA are belong to us

The story of the role of DNA in the criminal justice system is quite interesting. Heralded as the ultimate in crime solving, DNA has slowly infiltrated the collective consciousness of the entire nation and infected our lawyers, judges and jurors. It’s a double-edged sword, to be sure: DNA can accurately (or maybe not) identify an individual who leaves behind some trace materials at or in a crime scene, thereby implicating or exculpating a suspect. Fueled by DNA based shows like CSI, jurors became more demanding and mistakenly over reliant on the science, producing the “CSI effect”, DNA, on the other hand, has drawbacks that defense lawyers try to highlight – which I’m not sure have sunk in yet – like the fact that you it can’t tell you when it was deposited. DNA is most famous for high-profile exonerations of people already convicted of crimes and serving lengthy prison sentences.

But DNA is much more than that. As the science grows, the uses and implications of the genetic markers grows by leaps and bounds (see here and for the future, see here).

Which is why DNA, and the collection of DNA, is so attractive to law enforcement agencies. Unfortunately, as is often the case, the evolution of science and technology and the desired application of these new uses conflicts to some degree with the core protections of the Constitution.

Just yesterday, a 3 judge panel of the 9th Circuit heard an appeal in a lawsuit filed by the ACLU challenging the legality of California’s DNA-collection-upon-arrest law. That’s essentially all there is to the law: collect the DNA of everyone ever arrested. (Connecticut tried to pass a similar bill two years ago and it was ultimately rejected.) Under some circumstances, the DNA may never be deleted from their database: Continue reading →