Polygraph Success Stories?

Polygraph Success Stories? My husband had to take a Polygraph test today. He didn't pass but he didn't fail either. He was undeterminable. He made the person conducting the test very aware of his stutter. He is also rescheduled to try again next week Has anyone experienced success or passed a polygraph test? He's not looking to cheat his way through but is curious if it really comes down to his stutter There is little to no evidence based support for either answer that we can find Thanks