tl;dr: polygraphs aren't reliable and can be misused?
It's not that they're unreliable, they simply don't work in the first place.
The misuse is that they're used at all.
And they are performed interrogation style but cannot be refused without risking your career.
OTOH, someone arrested can (probably should?) refuse.
It's not that they're unreliable, they simply don't work in the first place.
The misuse is that they're used at all.