Is this what you are referring to as far as the lie detector tests go? This was on wftv.com, about halfway down in the article.
http://www.wftv.com/news/17483047/detail.html
"CASEY'S FORMER FRIENDS TAKE LIE DETECTOR TESTS
Detectives still can't shake the truth from Caylee's mom Casey, but her ex-fiancé, ex-lover and ex-best friend have talked and investigators want to make sure it's legitimate.
Sources told Eyewitness News exclusively that Casey's ex-fiancé Jesse Grund, ex-lover Ricardo Morales and ex-best friend Amy Huizenga all went through lie detector tests. Sources said they were conducted not because they were accused of anything, but to make sure detectives could confirm all the details of their stories.
Huizenga is the same friend from whom Casey's accused of stealing checks from". (from wftv.com website)