It sounds like this was a stupid test all the way around.

Sure, they got an unaccompanied "package" checked as baggage by paying a bribe. But said unaccompanied package was screened, presumably with CTX, and cleared. Like all checked bags.

On the other hand, a shipper could walk up to the cargo side of the airport, not even pay a bribe, and get the unaccompanied package on the same aircraft, possibly with no screening whatsoever if they have gone through the "trusted shipper" process.

Until the cargo screening problem is 100% fixed, doing these sorts of tests on the passenger/baggage side is pointless.