Sodium Thiopental could be used to weed out the criminals from innocent, but its use is often considered a violation of the 5th amendment. That's a key phrase equivalent for, "Oh! Oh!, they can prove my guilt with that, regardless of the amount of money and power I have." As such, both the criminals and the innocent will inevitably be sent down the river or the grave while ideologues continue to engage in political debates related to the drug's legality or usage in a criminal setting.