The cops have been relying on the "green tongue" schtick for years expecting juries to believe that nonsense. In a pot-DUII trial, upon hearing testimony from an officer about how the NHTSA training manual says pot smoking turns your tongue green I have seen jurors roll their eyes and hold back laughter.
The verdict was not guilty.

John Adams already got his own commemorative dollar coin recently, can't we just glue one to the pavement somewhere in D.C. and call it good?

Don't go dissin' Pius XII. He cured me of "green tongue" just in the nick of time last week. I'm pretty sure. My memory is a little hazy, but I remember a tall hat and some guy by the name of "Twelve," so who else could it have been?