I had the same experience and I can relate. However I did not spend thousands of dollar but I spent a few hundred for travelling and hotel because I choose to do the VBT in Miamia rather than NY which was my error. I did pass all levels up until the schedule of my polygraph. I must say My exmainer did the exact same thing. I am afican american and I was qualified for GS7 so I already had a disadvantage because of my color. He greeted me and this was a caucasian examiner blue eyes bald head. We got into the room he began to start a regular convo as mentioned that I shouldnt be nervous and all these other bs about he can tell if I was cheating by usind thumb tack under my shoes, or garlic under my tongue etc. He strapped the machine on me then asked me to repeat several questions over and over for about a hour or two. Then he told me I was 98% passed and that there is 2% of information he needs to ask of me without be being connected to the machine. He started asking me was there anything else I did that I never got caught for. Mind you I already told me I was arrested 3 times one for suspended license, other for resisting to show a cop my drivers license and the other for dsorderly conduct. I then responded saying I have nothing else to tell you but I can tell he felt offended. He began to say I think you are lying about something that you did and was never arrested for such as, killing someone and burry them in my back yard, lying about smoking pot 3 times in my entire life, or aiding a family member who had entered the U.S. illegally. I told him none of those are true and he continues to tell me that I am lying about something. He started to say that he can help me If I told him the truth and referred to me as " my brother be real with me" I can help you if you just tell me. I told him again that whatever infomation you have thats everything that I did. He said we gonna sit here until you tell me the truth then he told me take a break. I came back after the 15 min break then he said you thought of soemthign on your break that you never mentioned? I responded by saying no I did not. He continued to plead with me to tell a lie on myself saying you are this close to passing and I want to pass you but I think you are disclosing information. After trying and trying to get me to agree with him he realized that I wasn't going to fall into his trap. He said you have to do this for your kids and tell the truth. I said I am doing this for my daughters by telling you that there is nothing else about me to find out. He then said this concludes the exam and the resulf is not up to me. He will forward my information back to washington and they will reply back in 2 weeks with a decision. I did receive a decision in 2 weeks but it said I failed the polygraph. Now I never felt so cheated in my life for something that I honestly worked so hard for. Because of that I contacted HR and asked if I could appeal then said there was no appeal. I took the exama again 3 year after than and passed but was unable to continue because they have it in the database that I failed the polygraph within the 3 years limit.