My husband had actually recommended a polygraph during one of our marathon discussions about 1.5 years after discovery. Shortly after this he was diagnosed with colon cancer with mets to liver. He was very sick, became septic after surgery and almost died. Was on a lot of different meds and had chemo for 6 months. After he finished the chemo sessions and was better, I scheduled the polygraph. He failed. He swears he was telling the truth.