Bunco squad

[Kai]

The [bunco] squad is those policemen who investigate confidence [swindles]. In use from the 40s through the 60s. Not usual among law enforcement today.
The original bunco was a dishonest gambling game. Perhaps a variant of banco, from Spanish [banca], which is a card game similar to monte.
Eventually the word evolved to mean swindling or fraud of any sort).
Now applied to various groups of poseurs who appear with their wack front.