LieBabyCryBaby,

This post in my opinion is your best to date, and commendable for being of substance. And you bring up some good points in your questions. I will let George address  the issues, since I will not or could not  speak for him.  But my analysis on the points  are, you have a 16 year old teenager, being interrogated by two professional detectives that are interrogators. Not a fair match by any means. And they grilled him from this story for over 7 hours. I could make this kid believe he shot Jimmy Hoffa after seven hours.  This is a case very similar to the one from Escondido, California, there the brother and his friends were interrogated for 16 hours and eventually confessed to killing his sister. And was later proven to be innocent. The sister was killed by a drifter that was in the neighborhood. But your point that possibility that they ignored the Polygraph results points to its inherent danger. And as an interrogation prop it has the ability to make the weak break and confess to anything.  Now as far as him knowing things that only the killer could have known, he knew her for quite some time. Not a mystery there. I do believe that the detectives were also quite a bit overzealous and looking to wrap this up ASAP. Bottom line is still the polygraph one way or the other, helped put an innocent away. And now I hope this guy has a great lawyer, as one big payday is coming for him.  And again good post.

Regards ..