I was just wondering why someone would willingly submit to a lie detector test? If law enforcement (LE) interviewed a suspect and asked them to take a polygraph test, I believe the suspect could just say no. The suspect has nothing to gain by saying yes. However, LE could have stated that they have evidence and are going to press charges unless they take the test (speculation on my part). The suspect takes a chance to try and pass to “prove innocence” but fails.
The big question then would be did LE really have enough evidence or were they bluffing? Could LE have been purely bluffing in an attempt to reduce the suspects but again why would a suspect even submit to a polygraph just by asking? The only scenario that I can see is that LE has evidence to convince the suspect to take the test but for some reason changed their mind about pressing charges after the polygraph test was failed. Could LE have been hoping for a confession?
Could some in LE now feel they have the right person and want to proceed but the person is now not easily accessible or someone else in the LE, prosecution, or judicial organization has made the decision not to proceed?