Originally Posted by
Section 107
A dog can be trained to indicate when it detects both narcotics and drugs, but as mentioned earlier, TSA does not train its dogs to do both, no reputable trainer will do so, and no law enforcement agency, certainly not one in the transportation sector, will employ a canine trained in both. Dogs do make mistakes and could give an incorrect indication for what it has detected; the consequences for such a mistake could be catastrophic and no governmental unit will take that risk.
There are thousands of law enforcement agencies just in the US so it is not possible to definitively state that none but TSA and its partner agencies are using PSCs. But I have not heard of any US federal entity other than TSA having a PSC program nor have I heard of any airports or mass transit LEA having their own canine teams not supplied by TSA using PSCs.
I fail to understand the distinction between narcotics and drugs as far as when a detection dog would be involved. I posted earlier in this thread that CBP trains dogs to detect both currency and firearms so it is clear that dogs can be taught to detect more than one target item. Seems to me that a police search by canine during passenger screening without warrant would be a violation.