Please do not take what I am about to say out of context, but... I personally think Casey Anthony is guilty, I am just not sure of exactly what yet.
With that said, Mr. Kronk does not come to the table with clean hands. There are so many questionable things about him that I do not lose a second of sleep over him being vetted by the defense.
Let us not forget, we all originally thought Ms. Kerley's claim were recent fabrications because she had an ax to grind. And Kronk had previously denied he had anything to hide.
HOWEVER, the next day Kronk's lawyer issued a statement admitting that he was not only arrested for the charges (meaning probable cause was found for the arrest) but that a Grand Jury was convened. The very fact a grand jury was convened is a big deal and it does not mean they found he did not do it, it only means they did not believe that a conviction could be obtained "beyond a reasonable doubt."
And I know this - he had the arrest records expunged, and expungements usually occur because someone has something embarrassing in their past they do not want someone to find out about.
So Kronk is no angel, is he Caylee's killer - I don't think that AT ALL. I just have no problem with him being fully vetted.
p.s. A person I know from high school worked with Kronk in his "office" job before Kronk got the axe. The only thing Kronk cared about was reward money and his workers compensation claim for his back. And he apparently bragged about putting the stick he used up for sale on eBay and other loony ideas to make a buck.