First off, I"m very sorry for what happened to you.

But I'm unclear as to why you are surprised by the polygrapher lying - their job is to lie - that's the whole point of the test - to trick you.  So it's not surprising that most polygraphers are of the type who would cheat and lie - they must feel above the law.  They gain that self-confidence that propels them to lie without a conscience when they know their important work involves turning people's lives around based on their common perceptions, which is as good as the average joe's.

Frankly, I would seek legal advice - especially since you have proof.  I would also report Bruce to the authorities and write a letter to the association he belongs to.