Comments from a former supervisor of a polygraph unit from 2nd Nancy Grace show:
GRACE: Joining me also is
Lt. Christopher Pukenas, former supervisor of a polygraph unit.
Lieutenant, thank you for being with us. Why is it so important that both parents take polygraphs and what are police looking for in addition to pass, fail, inconclusive on that polygraph? What else do you look for?
LT. CHRISTOPHER PUKENAS,
FORMER SUPERVISOR, POLYGRAPH UNIT NEW JERSEY STATE POLICE: Well, we take a statement from the persons as well when we give them the polygraph.
And it`s interesting, some of the things that the father said in the statement that I had seen, that he said that how much the boy had meant to him, past tense, things like that.
And I find it interesting that he wouldn`t really -- I miss him. I`m looking for him. I`m doing everything I can to find him, rather than say, how much he meant to me. Things like that. So we look for statements as well. We`ll get to them first and prior to the polygraphs.
http://transcripts.cnn.com/TRANSCRIPTS/1212/03/ng.01.html