I don't know currently. I am nearly certain when we have cybernetic robots, much of these dangerous illegal activities will go away. We can manufacture tens of millions of iRobot-Cops to keep illegal dangerous products out of the country. They will have heat sensing eyesight, built in metal detectors, the nose of a dog to sniff out gun powder, access to the entire world's database of face recognition databases, they will read lips from a mile away, etc, etc etc.
I realize this is science fiction. Until then, what I suggested may save lives over time.