Unprofessional use of the polygraph was probably the reason why everyone was failing them in the early stages of the investigation. Clint was wise to duck out of that, with his earlier brushes with the law he probably had more street smarts than the rest of them in that respect.
You may be remembering a bunch of rumors about Clint, because he was never officially under suspicion, as I recall. Maybe you are confusing him with SA, who originally couldn't take the test because he was on drugs?
Both Adkins and Hailey's mother initially were turned away from polygraphs for being under the influence of narcotics, the affidavits state.
http://www.timesrecordnews.com/news...wers-questions-raised-by/?partner=yahoo_feeds
Hailey's father, Clint Dunn, has not taken a polygraph yet, and is not scheduled to take one at this time. He says he has volunteered to take a test.
http://bigcountryhomepage.com/fulltext/?nxd_id=328866
From Nancy Grace Transcript, in their own words, Jan. 6, 2011
Billie Dunn, thanks for being with us. What happened in the polygraph?
BILLIE DUNN: Thanks for having us again. I don`t know. They had me very faithful (ph) in that test. We brought the polygraph up first. We asked for it, and they were told us -- they told us they were very confident in those tests. They -- I put a lot of confidence into those tests.
The first Friday they had it set up for us to take, we had taken Ativan the night before to go to sleep. They didn`t tell us we couldn`t have anxiety medicine. So when we were able to get it set up again -- Shawn had actually called them and asked them if he could come down and take it yet, and they said yes. They came, picked him up. He took his. I went in. They told me he failed it. I lost it, of course. I told them I had so much faith in that test.
Then they took me over to the courthouse. I took a polygraph test. I failed it, lost all faith in the test. A couple of other people failed it. One guy I do not know. One person took it three times, took it twice and failed it...
GRACE: Well, let me ask you this, Ms. Dunn...
BILLIE DUNN: ... then took it and passed it.
GRACE: Who administered the polygraph to you? Who was it?
BILLIE DUNN: His name was Matt. I believe there were two different...
GRACE: Well, was it the local -- was it the local police, the FBI? Was it the Texas Rangers?
BILLIE DUNN: No, he`s a polygrapher that came from Big Spring, out of town.
GRACE: OK, Billie Dunn -- everyone, with us is Hailey`s mother. What questions did they ask you? What`d they ask you?
BILLIE DUNN: They asked if I knew anything about the disappearance of Hailey, if I caused the disappearance of Hailey, and if there were any questions I was scared that he was going to ask me.
GRACE: Let me ask you this, Billie Dunn. Where is your boyfriend?
BILLIE DUNN: He went back to his grandma`s house.
GRACE: Why?
BILLIE DUNN: As soon as I found out he failed the test, I told him I didn`t want him back at my house. And now I don`t know what to think anymore. I would just rather he stay there until she comes home or they find her and we clear this up.
~~~~~~
CLINT DUNN, FATHER: I told them that I would take one, too.
GRACE: I`m sorry. I couldn`t hear you. Repeat?
CLINT DUNN: I told the FBI yesterday that I would take one.
GRACE: And are they scheduling that for you?
CLINT DUNN: I have no idea.
http://transcripts.cnn.com/TRANSCRIPTS/1101/06/ng.01.html