TwoBlock,
Good to see you back. Your sentiments regarding this issue are the same as mine. For some reason, at least ten of these people had a strong reaction to the questions. Could it be they reacted in righteous indignation to being a suspect? Could it be that the mere thought of the crime caused them to react with revulsion? Perhaps they feared that the polygraph would finger them in spite of their innocence?
For whatever reasons, it is quite obvious that some reason other than lying caused the physiological responses that were measured and scored as deception. This case is near the top of the list in questioning the validity of polygraphs.
BTW, Happy 50th to you and your wife :)