Donna,

It is not at all unusual for truthful people to wrongly fail the polygraph. You'll find statements from others who were falsely accused of deception (myself included) here:

https://antipolygraph.org/statements.shtml

Polygraph "testing" has no scientific basis, and the results should not be relied on for any purpose. Your family wasted its money on the lie detector, and it would be a mistake to throw good money after bad by taking yet another lie detector test.

Instead, I suggest that you educate your family about the unreliability of lie detector testing. You'll find a thorough debunking of it in our free book, The Lie Behind the Lie Detector, which you can download here:

https://antipolygraph.org/lie-behind-the-lie-detector.pdf

You may also wish to show them this CBS 60 Minutes investigative report on lie detector:

https://antipolygraph.org/blog/?p=110