Random Breath Testing...

Some few years back, just after the introduction of Random Breath Testing, the Police officers of a small country township had to show the community that the RBT was working. They decided to stake out the local Masonic Hall, then as the night wore on, eventually a mason slowly came down the stairs and got into his car.
The moment he started the engine the two officers approached him and asked him to "blow into the bag".  He did of course but to the amazement of the officers proved negative. Fearing a faulty bag tried again, with the same results. Sure of a possible conviction they then escorted him to the Police station to do a blood test, with it also proving negative.
Being upset with this they then asked him what had gone on and what he had done that evening, to which he answered, "The Grand Master was there, the Grand Secretary was there, the Grand Stewards were there and we all had a great time, as to my job I was the Grand Decoy".