The WaPo’s Robert McCartney recently looked at how the recent Supreme Court ruling might affect court cases in Fairfax County, Virginia, writing that it will create a lot costly changes with little practical benefit, put a heavier burden on the state forensic lab and give defense attorneys a new weapon.

On the bright, though, McCartney notes this ruling could change up the way our justice system deals with drunken driving and marijuana use.

And again, there are members of Congress who should be paying attention.