It's not something usable on random criminals. In a sense it is do-not-care. If what was possible would be used for everything, everyone would be more or less aware, making it much less useful. Like the heart attack gun the CIA has since the 1960s. It's used sparingly enough for most people to not even know that it exists. (It's basically an untraceable killing method with a disintegrating projectile that induces a heart attack int he victim.)

What you describe isn't something the people with access to the good stuff would be even aware of, I believe. Too insignificant to reveal their hand.