If Obama doesn't want to take the political risk that such a mass pardoning may bring, he could at least start with the most heinous cases, like the many people serving life sentences for as little as cocaine residue in a clothing pocket.
It's remarkable how little scrutiny the DEA faces from Congress or other federal overseers. Over the last 40 years Congress has rarely held hearings on the DEA, its actions, or its efficacy. I hope this is a wake-up call for members of Congress.
When the true facts of an investigation's origin and development are withheld not only from defense lawyers but from prosecutors and judges, the rights to a fair trial and to confront one's accusers are rendered meaningless.