Justice Kagan and the two justices who joined her concurrence considered a trained drug-detection dog to be a device not in general public use, and on those grounds would have found its use unconstitutional in light of Kyllo.

FORBES: Supreme Court Finds The Use Of A Drug-Sniffing Dog To Investigate A Home Unconstitutional

Besides early detection, new tests will help doctors tailor drug regimens to the genetic quirks of each patient.

FORBES: Divining Disease

Detection is difficult for Asian governments because the trade is not organized and the drug is not manufactured in the region.

CNN: IN THE GRIP OF ECSTASY