I tend to agree, I think there were a lot of things in that press conference that were intended to make BG question what all evidence that investigators may have on him.
They want him to feel as though the walls are closing in
They want him to start acting out of his normal routine and character and missing work/ previous commitments
they want him to tell someone that he thinks he is being framed
They basically just want him to talk, talk to anyone about his uneasiness
They probably have there eyes and ears focused on a small group of suspects and are just waiting to pounce
I wonder if anyone in Delphi is acting strange? Dyed hair, grew a beard, changed their appearance drastically or disappeared, moved away, didn't return from college after all or took a sudden trip out of the country. In a town of 3,000, there's bound to be local chatter.