Because a dog with a certificate not worth the paper it's printed on is an effective loophole to abrogate our 4th Amendment rights. The dog "Bono" on whose performane the recent USSC decision rested only found drugs 25% of the times he alerted and yet passed certification by his department with flying colors.
Right now there is a lawsuit by Nevada Highway Patrol officers that their superiors are using "trick ponies" in their canine units...dogs trained to alert on cue from the handler, not because fhey've scented contraband...resulting in unlawful searches and seizures for the agency's financial benefit.
The problem is, drugs could have been present prior to the dogs first scenting them. AFAIK there is no way for a dog to transmit to the handler how old the scent is or what drug may have been present previously.
there is a lawsuit by Nevada Highway Patrol officers
The very officers that you claim can't be trusted and are liars. Can you make up your mind?